a. \(=6x^2-4x-9x+6=2x\left(3x-2\right)-3\left(3x-2\right)=\left(3x-2\right)\left(2x-3\right)\)

b. \(=6x^2+4x+9x+6=2x\left(3x+2\right)+3\left(3x+2\right)=\left(3x+2\right)\left(2x+3\right)\)

EM CHỊU EM MỚI HỌC LỚP 5 THUI À

Lớp 5 thì việc gì phải trả lời ?

1) \(6x^2-15x+6\) 

\(=6x^2-3x-12x+6\)

\(=3x\left(2x-1\right)-6\left(2x-1\right)\)

\(=\left(3x-6\right)\left(2x-1\right)\)

\(=3\left(x-2\right)\left(2x-1\right)\)

b) \(6x^2-20x+6\) 

\(=6x^2-2x-18x+6\)

\(=2x\left(3x-1\right)-6\left(3x-1\right)\)

\(=\left(2x-6\right)\left(3x-1\right)\)

\(=2\left(x-3\right)\left(3x-1\right)\)

c) \(-10x^2-7x+6\)

\(=5x-10x^2+6-12x\)

\(=5x\left(1-2x\right)+6\left(1-2x\right)\)

\(=\left(5x+6\right)\left(1-2x\right)\)

d) \(10x^2-7x-12\)

\(=10x^2-15x+8x-12\)

\(=5x\left(2x-3\right)+4\left(2x-3\right)\)

\(=\left(5x+4\right)\left(2x-3\right)\)

1) 6x^2 - 15x + 6

= 6x^2 - 12x - 3x +6

= 6x (x - 2) - 3 (x - 2)

= (x - 2) (6x - 3)

= 3 (x - 2) (x - 1)

2) 6x^2 - 20x + 6

= 6x^2 - 18x - 2x + 6

= 6x (x - 3) - 2 (x - 3)

= (x - 3) (6x - 2)

= 2 (x - 3) (3x - 1)

3) -10x^2 - 7x + 6

= -10x^2 + 5x - 12x + 6

= 5x (1 - 2x) + 6 (1 - 2x)

= (1 - 2x) (5x + 6)

4) 10x^2 - 7x - 12

= 10x^2 - 15x + 8x - 12

= 5x (2x - 3) + 4 (2x - 3)

= (2x - 3) (5x + 4)

good luck !

giúp mk vs 
1,a^3b^2+ 18a^2b^2+ 108ab^2+ 216b^2
2, 64xy-96x^2y+ 48x^3-8x^4y

\(6x^2+20x+6=6x^2+18x+2x+6\)

\(=6x\left(x+3\right)+2\left(x+3\right)\)

\(=\left(x+3\right)\left(6x+2\right)\)

\(=2\left(x+3\right)\left(3x+1\right)\)

a. \(=6.\left(x^2+2x+1\right)=6\left(x+1\right)^2\)

b. \(=8x^2-6x+4x-3=2x\left(4x-3\right)+\left(4x-3\right)=\left(2x+1\right)\left(4x-3\right)\)

c. \(=8x^2+6x-4x-3=2x\left(4x+3\right)-\left(4x+3\right)=\left(2x-1\right)\left(4x+3\right)\)

\(1,3x^2+3x-6=3x^2-3x+6x-6=\left(3x^2-3x\right)+\left(6x-6\right)=3x\left(x-1\right)+6\left(x-1\right)=\left(x-1\right)\left(3x+6\right)\)

\(2,6x^2-13x+6=6x^2-4x-9x+6=\left(6x^2-4x\right)-\left(9x-6\right)=2x\left(3x-2\right)-3\left(3x-2\right)=\left(3x-2\right)\left(2x-3\right)\)

\(3,6x^2-15x+6=6x^2-3x-12x+6=\left(6x^2-3x\right)-\left(12x-6\right)=3x\left(2x-1\right)-6\left(2x-1\right)=\left(2x-1\right)\left(3x-6\right)\)

a)3x²+7x-6

=3x²-2x+9x-6

=x(3x-2)+3(3x-2)

=(x+3)(3x-2)

b)8x²-2x-3

=8x²-6x+4x-3

=2x(4x-3)+(4x-3)

=(2x+1)(4x-3)

c)6x²-15x+6

=3(2x²-5x+2)

=3(2x²-x-4x+2)

=3[x(2x-1)-2(2x-1)]

=3(x-2)(2x-1)

d)10x²+7x-6

=10x²+12x-5x-6

=2x(5x+6)-(5x+6)

=(2x-1)(5x+6)

(2x+1)(x2+x+1)(3x2+3x+1)

6x^5+15x^4+20x^3+15x^2+6x+1

=3x^4(2x+1)+6x^3(2x+1)+7x^2(2x+1)+4x(2x+1)+(2x+1)

=(2x+1)(3x^4+6x^3+7x^2+4x+1)

=(2x+1)(3x^2(x^2+x+1)+3x(x^2+x+1)+(x^2+x+1)

=(2x+1)(x^2+x+1)(3x^2+3x+1)

6x⁵+15x⁴+20x³+15x²+6x+1

= (6x⁵+3x⁴)+(12x⁴+6x³)+(14x³+7x²)+(8x²+4x)+(2x+1)

= (2x+1)(3x⁴+6x³+7x²+4x+1)

= (2x+1)[(3x⁴+3x³+3x²)+(3x³+3x²+3x)+(x²+x+1)]

= (2x+1)(x²+x+1)(3x²+3x+1)