Tìm x
x+12^4=20730
3x^12+20x^6+6 = 0
Những câu hỏi liên quan
1. 4 + x = 7 - 2x
2. 5 + x = 8,3 + 4,7 - x
3. x + 12 = 35 + ½x
4. 6 + x = 7⅓ + 2 - x
5. 20x + 4 = 19,2 + 15x
6. x + 5 = 8 2/5 - 4x
7. 3 (x +1) = 13,5
8. 32 - (32 - x) = 32
9. 5x - 12 3/5 = 0
10. x - 10/3 = 0
P/s : Please, help me 😋😋
4 + x = 7 - 2x
4 + x + 2x = 7
4 + 3x = 7
3x = 7 - 4
3x = 3
x = 3 : 3
x =1
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5 + x = 8,3 + 4,7 - x
5 + x + x = 8,3 + 4,7
5 + 2x = 13
2x = 13 - 5
2x = 8
x = 8 : 2
x= 4
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1) [12,(1)-2,3(6)]:4,(21) = ?
2) Tìm x biết 0,(12):1,(6)=x:0,(4)
1)Ta có: \(12,\left(1\right)=12+0,\left(1\right)=12+\frac{1}{9}=\frac{109}{9}\);
\(2,3\left(6\right)=2,3+\frac{1}{10}\times0,\left(6\right)=2,3+\frac{1}{10}\times6\times0,\left(1\right)=2,3+\frac{1}{10}\times6\times\frac{1}{9}=\frac{71}{30}\)\(4,\left(21\right)=4+21\times0,\left(01\right)=4+21\times\frac{1}{99}=\frac{139}{33}\)
\(\Rightarrow\)\(\left[\frac{109}{9}-\frac{71}{30}\right]\div\frac{139}{33}=\frac{9647}{4170}\)
2)Ta có: \(0,\left(12\right)=12\times0,\left(01\right)=12\times\frac{1}{99}=\frac{4}{33}\)
\(1,\left(6\right)=1+6\times0,\left(1\right)=1+6\times\frac{1}{9}=\frac{5}{3}\)
\(0,\left(4\right)=4\times0,\left(1\right)=4\times\frac{1}{9}=\frac{4}{9}\)
\(\Rightarrow\frac{4}{33}\div\frac{5}{3}=x\div\frac{4}{9}\Rightarrow x\div\frac{4}{9}=\frac{4}{55}\Rightarrow x=\frac{4}{55}\times\frac{4}{9}\Rightarrow x=\frac{16}{495}\)
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17 tháng 8 2021 lúc 14:38
TÌM \(x\)
-12 / 25 . ( 3 / 4 \(-\) \(x\) + 6 / -11 \(-\) 5 / 6 ) = 0
Tìm x,y,z nguyên biết x²-4xy+5y²+20x-22y+12=0
Tìm số nguyên x biết: a) x + 12 = 4; b) 19 - x = 0; c) 2x - 4 = -12;d) 2x- (-2) = 6
a)x=4-12=-8
b)x=19-0=19
c)x=-12+4:2=-4
d)x=6+(-2):2=2
bài 6: tìm x thuộc Z
i) (-12).x = (-15).(-4) - 12
j) |x| - 3 = 0
k) ( 7 - |x| ).(2x - 4 ) = 0
i) (-12).x=48
x=48:(-12)
x=-4
j) |x|-3=0
x=0+3
x=3
i, \(\left(-12\right)\times x=\left(-15\right)\times\left(-4\right)-12\)
\(\left(-12\right)\times x=60-12\)
\(\left(-12\right)\times x=48\)
\(x=48:\left(-12\right)\)
\(x=-4\)
b, \(\left|x\right|-3=0\)
\(\left|x\right|=0+3\)
\(\left|x\right|=3\)
\(\Rightarrow\hept{\begin{cases}x=3\\x=-3\end{cases}}\)
Vậy \(x=3\) hoặc \(x=-3\)
hk tốt ~
i) (-12).x = 60-12
-12.x=48
x= - 4
J) /x/ =3 suy ra x=3 hoặc x=-3
k) 7-/x/ = 0 hoặc 2x-4 = 0
/x/ = 7 hoặc 2x=4
x thuộc {7; - 7 } hoặc x= 2
Vậy x thuộc {7; - 7; 2 }
Phân tích đa thức sau thành nhân tử bằng phương pháp dùng bằng đẳng thức
1.x^2-7x+10
2.x^2+3x+2
3.x^2-7x+12
4.x^2+7x+12
5.16x-5x^2-3
6.6x^2+7x-3
7.3x^2-3x-6
8.3x^2+3x-6
9.6x^2-13x+6
10 6x^2+15x+6
11.6x^2-20x+6
12.8x^2+5x-3
Xem chi tiết
1) x2 -7x + 10 = x2 - 2x - 5x + 10 = x(x - 2) - 5(x - 2) = (x - 5)(x - 2)
2) x2 + 3x + 2 = x2 + 2x + x + 2 = x(x + 2) + (x + 2) = (x + 1)(x + 2)
3) x2 - 7x + 12 = x2 - 3x - 4x + 12 = x(x - 3) - 4(x - 3) = (x - 3)(x - 4)
4) x2 + 7x + 12 = x2 + 3x + 4x + 12 = x(x + 3) + 4(x + 3) = (x + 3)(x + 4)
5) 16x - 5x2 - 3 = 15x - 5x2 + x - 3 = -5x(x - 3) + (x - 3) = (x - 3)(1 - 5x)
6) 6x2 + 7x - 3 = 6x2 - 2x + 9x - 3 = 2x(3x - 1) + 3(3x - 1) = (2x + 3)(3x - 1)
7) 3x2 - 3x - 6 = 3x2 - 6x + 3x - 6 = 3x(x - 2) + 3(x - 2) = (x - 2)(3x + 3) = 3(x - 2)(x + 1)
8) 3x2 + 3x - 6 = 3x2 - 3x + 6x - 6 = 3x(x - 1) + 6(x - 1) = (x - 1)(3x + 6) = 3(x - 1)(x + 2)
9) 6x2 - 13x + 6 = 6x2 - 9x - 4x + 6 = 3x(2x - 3) - 2(2x - 3) = (3x - 2)(2x - 3)
10) 6x2 + 15x + 6 = 6x2 + 12x + 3x + 6 = 6x(x + 2) + 3(x + 2) = (x + 2)(6x + 3) = 3(x + 2)(3x + 1)
11) 6x2 - 20x + 6 = 6x2 - 18x - 2x + 6 = 6x(x -3) - 2(x - 3) = (6x - 2)(x - 3) = 2(3x - 1)(x - 3)
12) 8x2 + 5x - 3 = 8x2 + 8x - 3x - 3 = 8x(x + 1) - 3(x + 1) = (x + 1)(8x - 3)
Tìm x: (x-12)-(3x-4)-6=0
(x-12)-(3x-4)-6=0
(x-12) -( 3x-4) = 0+6
x-12 -3x+4 = 6
x - 3x -12+4=6
-2x -12 = 6-4 =2
-2x = 2+12
-2x =14
x= 14:(-2)
x= -7
Vậy...
(x - 12) - (3x - 4) - 6 =0
<=> x - 12 - 3x + 4 - 6 = 0
<=> - 2x -14 = 0
<=> -2x = 14
<=> -x = 7
<=> x = 7
( x - 12 ) - ( 3x - 4 ) - 6 = 0
=> ( x - 12 ) - ( 3x - 4 ) = 6
=> x - 12 - 3x + 4 = 6
=> x - 3x - 12 + 4 = 6
=> - 2x = 6 - 4 + 12
=> - 2x = 14
=> x = - 7
Tìm x, biết:a) (x - 3.5).12 0;b) 35. (x - 10) 35;c) ( x - 5): 3 + 3 24d) ( x - 4) : 3 - 2 100c) 25.(2.x - 4).12 0d) (x - 4) : 6 - 5 10
Đọc tiếp
Tìm x, biết:
a) (x - 3.5).12 = 0;
b) 35. (x - 10) = 35;
c) ( x - 5): 3 + 3 = 24
d) ( x - 4) : 3 - 2 = 100
c) 25.(2.x - 4).12 = 0
d) (x - 4) : 6 - 5 = 10
