(X+1/2)^2=1/8
(X+5/2)^2=1/36
(4x-2/5)^2=4/100
X^2-3=22
4x^2-10=134
Mình cần gấp
Những câu hỏi liên quan
Tìm x, biết:1) 2x . (x-5) -x . (2x-4) 152) (x+1) . (x+2) - (x+4) . (x+3) 63) 4x2 - 4x+5 - x . (4x-3) 1-2x4) (x+3) . (2x+1) - 2x2 4x-55) -4 . (2x-8) + (2x-1) . (4x+3) 06) -3 . (x-2) + 4 . (2x-6) - 7 . (x-9) 5 . (3-2)7) (x-2) . (x+2) -2 . (x-4) 10. 3x8) 15x . (x-2) - (5x-1) . (3x + 1) 69) (2x+4) . (x-3) - x . (2x-10) 15-20x10) (4x-2) . (3x+4) - (2x-1) . (6x+5) 100 HEPL ME !!! Cần làm gấp những bài này, ai lm dc mk tick cho ng đó nha !!! THANK YOU !!!!
Đọc tiếp
Tìm x, biết:
1) 2x . (x-5) -x . (2x-4) = 15
2) (x+1) . (x+2) - (x+4) . (x+3) = 6
3) 4x2 - 4x+5 - x . (4x-3) = 1-2x
4) (x+3) . (2x+1) - 2x2 = 4x-5
5) -4 . (2x-8) + (2x-1) . (4x+3) = 0
6) -3 . (x-2) + 4 . (2x-6) - 7 . (x-9)= 5 . (3-2)
7) (x-2) . (x+2) -2 . (x-4) = 10. 3x
8) 15x . (x-2) - (5x-1) . (3x + 1) = 6
9) (2x+4) . (x-3) - x . (2x-10) =15-20x
10) (4x-2) . (3x+4) - (2x-1) . (6x+5) = 100
HEPL ME !!! Cần làm gấp những bài này, ai lm dc mk tick cho ng đó nha !!! THANK YOU !!!!
Tìm x, biết:
1) 2x ( x - 5) - x ( 2x - 4 ) = 15
<=> 2x2 - 10x - 2x2 + 4x - 15 = 0
<=> -6x - 15 = 0
<=> -6x = 15
<=> x = -15/6
2) ( x +1)( x + 2 ) - ( x + 4 ) ( x + 3 ) = 6
<=> x2 + 2x + x + 2 - x2 - 3x - 4x - 12 - 6 = 0
<=> -4x = -16
<=> x = 4
3) 4x2 - 4x + 5 - x ( 4x - 3) = 1 - 2x
<=> 4x2 - 4x + 5 - 4x2 + 3x - 1 + 2x = 0
<=> x + 4 = 0
<=> x = -4
4) ( x + 3 ) ( 2x + 1 ) - 2x2 = 4x - 5
<=> 2x2 + x + 6x + 3 - 2x2 - 4x + 5 = 0
<=> 3x + 8 = 0
<=> 3x = -8
<=> x = -8/3
5) -4 ( 2x - 8 ) + ( 2x - 1 )( 4x + 3 ) = 0
<=> - 8x + 32 + 8x2 + 6x - 4x - 3 = 0
.......
6) -3 . (x-2) + 4 . (2x-6) - 7 . (x-9)= 5 . (3-2)
<=> -3x + 6 + 8x - 24 - 7x + 63 - 5 = 0
<=> -2x + 40 = 0
<=> -2x = -40
<=> x = 20
Còn lại tương tự ....
Đúng 0
Bình luận (0)
Xem thêm câu trả lời
B=[ x+1/2x-2+3/x2-1-x+3/2x+2]×4x2-4/5
x2-36/2x+10×3/6-x
5x+10/4x-8×4-2x/x+2
11-4x2/x2+4x:2-4x/3x
(1/x2+x-2-x/x+1)÷(1/x+x-2)
a: \(B=\left(\dfrac{x+1}{2\left(x-1\right)}+\dfrac{3}{\left(x-1\right)\left(x+1\right)}-\dfrac{x+3}{2\left(x+1\right)}\right)\cdot\dfrac{4\left(x-1\right)\left(x+1\right)}{5}\)
\(=\dfrac{x^2+2x+1+6-x^2-2x+3}{2\left(x+1\right)\left(x-1\right)}\cdot\dfrac{4\left(x-1\right)\left(x+1\right)}{5}\)
\(=\dfrac{10}{1}\cdot\dfrac{2}{5}=10\cdot\dfrac{2}{5}=4\)
b: \(\dfrac{x^2-36}{2x+10}\cdot\dfrac{3}{6-x}\)
\(=\dfrac{\left(x-6\right)\left(x+6\right)}{2\left(x+5\right)}\cdot\dfrac{-3}{x-6}\)
\(=\dfrac{-3\left(x+6\right)}{2\left(x+5\right)}\)
c: \(\dfrac{5x+10}{4x-8}\cdot\dfrac{4-2x}{x+2}\)
\(=\dfrac{5\left(x+2\right)}{4\left(x-2\right)}\cdot\dfrac{-2\left(x-2\right)}{x+2}=\dfrac{-10}{4}=\dfrac{-5}{2}\)
d: \(\dfrac{1-4x^2}{x^2+4x}:\dfrac{2-4x}{3x}\)
\(=\dfrac{1-4x^2}{x\left(x+4\right)}\cdot\dfrac{3x}{2\left(1-2x\right)}\)
\(=\dfrac{\left(1-2x\right)\left(1+2x\right)}{x+4}\cdot\dfrac{3}{2\left(1-2x\right)}=\dfrac{3\left(2x+1\right)}{x+4}\)
Đúng 0
Bình luận (0)
giải các phương trình sau: a) 4x.(2x+3) - x.(8x-1) 5.(x+2) b) (3x-5).(3x+5) - x.(9x-1) 4 c) 3 - 4x . (25-2x) 8x^2 + x - 300 d) 2. (1-3x/5) - 2+3x/10 7-3.(2x+1)/4 e) 5x + 2/6 - 8x - 1 /3 4x + 2 /5 - 5 f) 5x - 4/2 16x + 1/7 g) 12x + 5 / 32x - 7/4 h) 3t - 8/12 5-t /8 i) 5u + 6/15 u - 4 /10 k) 3.(x-11)/4 3. (x+1) - 2.(2x+ 5)/10 l) 14 và 1/2 - 2. (x+3)/5 3x/2 - 2. (x-7 )/3 m ) 2x -5 / 6 - x +2 5x - 3/ 3 - 6x - 7/ 4 + x n) x-4/5 + 3x - 2/10 - x 2x-5/3 - 7x+2/6 mình đang cần gấp
Đọc tiếp
giải các phương trình sau:
a) 4x.(2x+3) - x.(8x-1)= 5.(x+2)
b) (3x-5).(3x+5) - x.(9x-1) = 4
c) 3 - 4x . (25-2x) = 8x^2 + x - 300
d) 2. (1-3x/5) - 2+3x/10 = 7-3.(2x+1)/4
e) 5x + 2/6 - 8x - 1 /3 = 4x + 2 /5 - 5
f) 5x - 4/2 = 16x + 1/7
g) 12x + 5 / 3=2x - 7/4
h) 3t - 8/12 = 5-t /8
i) 5u + 6/15 = u - 4 /10
k) 3.(x-11)/4 = 3. (x+1) - 2.(2x+ 5)/10
l) 14 và 1/2 - 2. (x+3)/5 = 3x/2 - 2. (x-7 )/3
m ) 2x -5 / 6 - x +2 = 5x - 3/ 3 - 6x - 7/ 4 + x
n) x-4/5 + 3x - 2/10 - x = 2x-5/3 - 7x+2/6
mình đang cần gấp
giải các phương trình sau: a) 4x.(2x+3) - x.(8x-1) 5.(x+2) b) (3x-5).(3x+5) - x.(9x-1) 4 c) 3 - 4x . (25-2x) 8x^2 + x - 300 d) 2. (1-3x/5) - 2+3x/10 7-3.(2x+1)/4 e) 5x + 2/6 - 8x - 1 /3 4x + 2 /5 - 5 f) 5x - 4/2 16x + 1/7 g) 12x + 5 / 32x - 7/4 h) 3t - 8/12 5-t /8 i) 5u + 6/15 u - 4 /10 k) 3.(x-11)/4 3. (x+1) - 2.(2x+ 5)/10 l) 14 và 1/2 - 2. (x+3)/5 3x/2 - 2. (x-7 )/3 m ) 2x -5 / 6 - x +2 5x - 3/ 3 - 6x - 7/ 4 + x n) x-4/5 + 3x - 2/10 - x 2x-5/3 - 7x+2/6 mình đang cần gấp
Đọc tiếp
giải các phương trình sau:
a) 4x.(2x+3) - x.(8x-1)= 5.(x+2)
b) (3x-5).(3x+5) - x.(9x-1) = 4
c) 3 - 4x . (25-2x) = 8x^2 + x - 300
d) 2. (1-3x/5) - 2+3x/10 = 7-3.(2x+1)/4
e) 5x + 2/6 - 8x - 1 /3 = 4x + 2 /5 - 5
f) 5x - 4/2 = 16x + 1/7
g) 12x + 5 / 3=2x - 7/4
h) 3t - 8/12 = 5-t /8
i) 5u + 6/15 = u - 4 /10
k) 3.(x-11)/4 = 3. (x+1) - 2.(2x+ 5)/10
l) 14 và 1/2 - 2. (x+3)/5 = 3x/2 - 2. (x-7 )/3
m ) 2x -5 / 6 - x +2 = 5x - 3/ 3 - 6x - 7/ 4 + x
n) x-4/5 + 3x - 2/10 - x = 2x-5/3 - 7x+2/6
mình đang cần gấp
giải các phương trình sau: a) 4x.(2x+3) - x.(8x-1) 5.(x+2) b) (3x-5).(3x+5) - x.(9x-1) 4 c) 3 - 4x . (25-2x) 8x^2 + x - 300 d) 2. (1-3x/5) - 2+3x/10 7-3.(2x+1)/4 e) 5x + 2/6 - 8x - 1 /3 4x + 2 /5 - 5 f) 5x - 4/2 16x + 1/7 g) 12x + 5 / 32x - 7/4 h) 3t - 8/12 5-t /8 i) 5u + 6/15 u - 4 /10 k) 3.(x-11)/4 3. (x+1) - 2.(2x+ 5)/10 l) 14 và 1/2 - 2. (x+3)/5 3x/2 - 2. (x-7 )/3 m ) 2x -5 / 6 - x +2 5x - 3/ 3 - 6x - 7/ 4 + x n) x-4/5 + 3x - 2/10 - x 2x-5/3 - 7x+2/6 mình đang cần gấp
Đọc tiếp
giải các phương trình sau:
a) 4x.(2x+3) - x.(8x-1)= 5.(x+2)
b) (3x-5).(3x+5) - x.(9x-1) = 4
c) 3 - 4x . (25-2x) = 8x^2 + x - 300
d) 2. (1-3x/5) - 2+3x/10 = 7-3.(2x+1)/4
e) 5x + 2/6 - 8x - 1 /3 = 4x + 2 /5 - 5
f) 5x - 4/2 = 16x + 1/7
g) 12x + 5 / 3=2x - 7/4
h) 3t - 8/12 = 5-t /8
i) 5u + 6/15 = u - 4 /10
k) 3.(x-11)/4 = 3. (x+1) - 2.(2x+ 5)/10
l) 14 và 1/2 - 2. (x+3)/5 = 3x/2 - 2. (x-7 )/3
m ) 2x -5 / 6 - x +2 = 5x - 3/ 3 - 6x - 7/ 4 + x
n) x-4/5 + 3x - 2/10 - x = 2x-5/3 - 7x+2/6
mình đang cần gấp
giải các phương trình sau: a) 4x.(2x+3) - x.(8x-1) 5.(x+2) b) (3x-5).(3x+5) - x.(9x-1) 4 c) 3 - 4x . (25-2x) 8x^2 + x - 300 d) 2. (1-3x/5) - 2+3x/10 7-3.(2x+1)/4 e) 5x + 2/6 - 8x - 1 /3 4x + 2 /5 - 5 f) 5x - 4/2 16x + 1/7 g) 12x + 5 / 32x - 7/4 h) 3t - 8/12 5-t /8 i) 5u + 6/15 u - 4 /10 k) 3.(x-11)/4 3. (x+1) - 2.(2x+ 5)/10 l) 14 và 1/2 - 2. (x+3)/5 3x/2 - 2. (x-7 )/3 m ) 2x -5 / 6 - x +2 5x - 3/ 3 - 6x - 7/ 4 + x n) x-4/5 + 3x - 2/10 - x 2x-5/3 - 7x+2/6 mình đang cần gấp
Đọc tiếp
giải các phương trình sau:
a) 4x.(2x+3) - x.(8x-1)= 5.(x+2)
b) (3x-5).(3x+5) - x.(9x-1) = 4
c) 3 - 4x . (25-2x) = 8x^2 + x - 300
d) 2. (1-3x/5) - 2+3x/10 = 7-3.(2x+1)/4
e) 5x + 2/6 - 8x - 1 /3 = 4x + 2 /5 - 5
f) 5x - 4/2 = 16x + 1/7
g) 12x + 5 / 3=2x - 7/4
h) 3t - 8/12 = 5-t /8
i) 5u + 6/15 = u - 4 /10
k) 3.(x-11)/4 = 3. (x+1) - 2.(2x+ 5)/10
l) 14 và 1/2 - 2. (x+3)/5 = 3x/2 - 2. (x-7 )/3
m ) 2x -5 / 6 - x +2 = 5x - 3/ 3 - 6x - 7/ 4 + x
n) x-4/5 + 3x - 2/10 - x = 2x-5/3 - 7x+2/6
mình đang cần gấp
giải các phương trình sau: a) 4x.(2x+3) - x.(8x-1) 5.(x+2) b) (3x-5).(3x+5) - x.(9x-1) 4 c) 3 - 4x . (25-2x) 8x^2 + x - 300 d) 2. (1-3x/5) - 2+3x/10 7-3.(2x+1)/4 e) 5x + 2/6 - 8x - 1 /3 4x + 2 /5 - 5 f) 5x - 4/2 16x + 1/7 g) 12x + 5 / 32x - 7/4 h) 3t - 8/12 5-t /8 i) 5u + 6/15 u - 4 /10 k) 3.(x-11)/4 3. (x+1) - 2.(2x+ 5)/10 l) 14 và 1/2 - 2. (x+3)/5 3x/2 - 2. (x-7 )/3 m ) 2x -5 / 6 - x +2 5x - 3/ 3 - 6x - 7/ 4 + x n) x-4/5 + 3x - 2/10 - x 2x-5/3 - 7x+2/6 mình đang cần gấp
Đọc tiếp
giải các phương trình sau:
a) 4x.(2x+3) - x.(8x-1)= 5.(x+2)
b) (3x-5).(3x+5) - x.(9x-1) = 4
c) 3 - 4x . (25-2x) = 8x^2 + x - 300
d) 2. (1-3x/5) - 2+3x/10 = 7-3.(2x+1)/4
e) 5x + 2/6 - 8x - 1 /3 = 4x + 2 /5 - 5
f) 5x - 4/2 = 16x + 1/7
g) 12x + 5 / 3=2x - 7/4
h) 3t - 8/12 = 5-t /8
i) 5u + 6/15 = u - 4 /10
k) 3.(x-11)/4 = 3. (x+1) - 2.(2x+ 5)/10
l) 14 và 1/2 - 2. (x+3)/5 = 3x/2 - 2. (x-7 )/3
m ) 2x -5 / 6 - x +2 = 5x - 3/ 3 - 6x - 7/ 4 + x
n) x-4/5 + 3x - 2/10 - x = 2x-5/3 - 7x+2/6
mình đang cần gấp
a,\(4x\left(2x+3\right)-x\left(8x-1\right)=5\left(x+2\right)\)
\(< =>8x^2+12x-8x^2+x=5x+10\)
\(< =>13x=5x+10< =>8x=10\)
\(< =>x=\frac{10}{8}=\frac{5}{4}\)
b, \(\left(3x-5\right)\left(3x+5\right)-x\left(9x-1\right)=4\)
\(< =>9x^2-25-9x^2+x=4\)
\(< =>x=4+29=33\)
c,\(3-4x\left(25-2x\right)=8x^2+x-300\)
\(< =>3-100x+8x^2=8x^2+x-300\)
\(< =>x+100x=3+300\)
\(< =>101x=303< =>x=\frac{303}{101}=3\)
d,\(2\left(1-\frac{3x}{5}\right)-\frac{2+3x}{10}=7-\frac{3\left(2x+1\right)}{4}\)
\(< =>2-\frac{6x}{5}-\frac{2+3x}{10}=7-\frac{6x+3}{4}\)
\(< =>-\frac{24x}{20}-\frac{4+6x}{20}+\frac{30x+15}{20}=5\)
\(< =>\frac{30x-6x-24x+15-4}{20}=5\)
\(< =>\frac{11}{5}=5< =>11=25\)(vo li)
e, \(\frac{5x+2}{6}-\frac{8x-1}{3}=\frac{4x+2}{5}-5\)
\(< =>\frac{25x+10}{30}-\frac{80x-10}{30}=\frac{24x+12}{30}-5\)
\(< =>\frac{24x+12+80x-10-25x-10}{30}=5\)
\(< =>79x-8=150\)
\(< =>79x=150+8< =>x=\frac{158}{79}\)
Xem thêm câu trả lời
Giải phương trình:
7. x5+4x4+x3+x2+4x+1=6
8. (x2-2x)2+2(x-1)2-2=0
9. (x4-625)2-100x2-1=0
5(3-2x) 5(4-x)=6-4x
-5(2-x)+4(x-3)=10x-15
-7(5-x)-2(x-10)=15
-4(x+1)+89x-3)=24
5(x-30-2(x+6)=9
help,cần gấp
a, thiếu đề
b, -5 ( 2 - x ) + 4 ( x - 3 ) = 10x - 15
<=> -10 + 5x + 4x - 12 = 10x - 15
<=> -x = 7 <=> x = 7
c,-7(5-x)-2(x-10)=15
<=> -35 + 7x - 2x + 20 = 15 <=> 5x = 30 <=> x = 6
d, -4(x+1) + 89x - 3 = 24
<=> 85x = 31 <=> x = 31/85
e, 5(x-30-2(x+6)) = 9
<=> 5 (-x-49) = 9 <=> -5x = 254 <=> x = -254/5
Đúng 0
Bình luận (0)
b: =>-10+5x+4x-12=10x-15
=>9x-10x=-15+22
=>-x=7
hay x=-7
c: =>-35+7x-2x+20=15
=>5x-15=15
=>x=6
d: =>-4x-4+72x-24=24
=>68x-32=24
hay x=14/17
Đúng 0
Bình luận (0)