`10, (3x)^2 - 9y^4`
`= (3x)^2 - (3y^2)^2`
`= (3x-3y^2)(3x+3y^2)`
`= 3. (x-y^2) . 3(x + y^2)`
`= 9(x-y^2)(x+y^2)`
`11, 16x^2 - (y^2)^2`
`=(4x)^2 - (y^2)^2`
`=(4x-y^2)(4x+y^2)`
`12, x^4 - (3y^2)^2`
`= (x^2)^2 - (3y^2)^2`
`=(x^2-3y^2)(x^2 + 3y^2)`
`13, (x-1)(x+1)`
`= x^2-1^2`
`=x^2-1`
`14, (x-5)(x+5)`
`=x^2-5^2`
`=x^2-25`
`15, (x-6)(6+x)`
`= (x-6)(x+6)`
`=x^2-6^2`
`=x^2-36`
Phân tích các đa thức sau thành nhân tử:
1) x3 - 7x + 6
2) x3 - 9x2 + 6x + 16
3) x3 - 6x2 - x + 30
4) 2x3 - x2 + 5x + 3
5) 27x3 - 27x2 + 18x - 4
6) x2 + 2xy + y2 - x - y - 12
7) (x + 2)(x +3)(x + 4)(x + 5) - 24
8) 4x4 - 32x2 + 1
9) 3(x4 + x2 + 1) - (x2 + x + 1)2
10) 64x4 + y4
11) a6 + a4 + a2b2 + b4 - b6
12) x3 + 3xy + y3 - 1
13) 4x4 + 4x3 + 5x2 + 2x + 1
14) x8 + x + 1
15) x8 + 3x4 + 4
16) 3x2 + 22xy + 11x + 37y + 7y2 +10
17) x4 - 8x + 63
1. Phân tích đa thức thành nhân tử
1) y^2-13y+12
2) y^2-13y+12
3) x^2-x-30
4) y^2+y-42
5) x^2+3x-10
6)x^2-8x+15
7) 2x^2-y^2+xy
8) x^2+x-6
9) y^2-y-12
11) x^2+3x+2
12) x^2-3xy+2y^2
13) x^2-5x+6
14) x^4+x^2+2x
15) x^4+4
16) x^4+x^2+1
17) x^2+x-2
Giải các phương trình sau: (TM ĐK)
1) \(\dfrac{11}{x}=\dfrac{9}{x+1}+\dfrac{2}{x-4}\)
2) \(\dfrac{14}{3x-12}-\dfrac{2+x}{x-4}=\dfrac{3}{8-2x}-\dfrac{5}{6}\)
3) \(\dfrac{x+5}{x^2-5x}-\dfrac{x+25}{2x^2-50}=\dfrac{x-5}{2x^2+10}\)
4) \(\dfrac{x+1}{x-1}-\dfrac{x-1}{x+1}=\dfrac{16}{x^2-1}\)
5) \(\left(1-\dfrac{x-1}{x+1}\right)\left(x+2\right)=\dfrac{x+1}{x-1}+\dfrac{x-1}{x+1}\)
mng giúp mk bài này nha. Cảm ơn bạn nhiều
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 / 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 / 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 / 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 / 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 phương trình
1) 16-8x=0
2) 7x+14=0
3) 5-2x=0
4) 3x-5=7
5) 8-3x=6
6) 8=11x+6
7)-9+2x=0
8) 7x+2=0
9) 5x-6=6+2x
10) 10+2x=3x-7
11) 5x-3=16-8x
12)-7-5x=8+9x
13) 18-5x=7+3x
14) 9-7x=-4x+3
15) 11-11x=21-5x
16) 2(-7+3x)=5-(x+2)
17) 5(8+3x)+2(3x-8)=0
18) 3(2x-1)-3x+1=0
19)-4(x-3)=6x+(x-3)
20)-5-(x+3)=2-5x
1) (4-3x) (10x-5)=0
2) (7-2x) (4+8x) = 0
3) (9-7x) (11-3x) = 0
4) (7-14x) (x-2) = 0
5) (2x+1) (x-3) = 0
6) (8-3x) (-3x+5) = 0
7) (16-8x) (2-6x) = 0
8) (x+4) (6x-12) = 0
9) (11-33x) (x+11) = 0
10) (x-1/4) (x+5/6) = 0
11) (7/8-2x) (3x+1/3) = 0
12) 3x - 2x^2 = 0
13) 5x + 10x^2 = 0
14) 4x + 3x^2 = 0
15) -8x^2 + x =0
16) 10x^2 - 15x = 0
17) x^2 -4 =0
18) 9 - x^2 = 0
19) x^2 -1 = 0
20) (x-3) (2x-1) = (2x-1) ( 2x+3)
21) (5+4x) (-x+2) = (5+4x) (7+5x)
22) (4+x) (x-5) = (3x-8) (x-5) = 0
23) (3x-8) (7-21x) - (9+2x) (7-21x)
24) (10+ 7x) (x+1) = (9x-2)(x-1)
25) (9x-4) (x-1/2) - (x-1/2) (6+x) = 0
26) 9x^2 - 1 = (3x-1) (x+4)
27) (x+7) (3x+1) = 49-x^2
28) (2x+1)^2 = (x-1)^2
29)x^3- 5x^2+6x = 0
30) 3x^2 + 5x + 2 = 0
Giảii giúpp mìnhh đyy mọii ngườii .
