Question

[êrgsrgrg]

Phân tích các đa thức sau thành nhân tử

a) 15x(x – 2) + 7y(2 – x)

b) 2x2(x – 11) + x(11 – x)

c) 4x(x – 3) – 6xy(3 – x)

d) x(x – y) + 7y(y – x)

e) 4(x– 3)2 – 2x(x – 3)

Answer 1

[Nguyễn Hoàng Minh]

\(a,=\left(x-2\right)\left(15x-7y\right)\\ b,=x\left(x-11\right)\left(2x-1\right)\\ c,=2x\left(x-3\right)\left(2+3y\right)\\ d,=\left(x-y\right)\left(x-7y\right)\\ e,=\left(x-3\right)\left(4x-12-2x\right)\\ =\left(x-3\right)\left(2x-12\right)=2\left(x-6\right)\left(x-3\right)\)