Đáp án:
Giải thích các bước giải:
$\text{a, 3x(x-y)-2y(x-y)}$
$\text{=(3x-2y)(x-y)}$
$\text{b, a(x+2)-2b(x+2)+(x+2)}$
$\text{=(a-2b+1)(x+2)}$
$\text{c, 5x(x-y)-(y-x)}$
$\text{=5x(x-y)-y+x}$
$\text{=5x(x-y)+(-y+x)}$
$\text{=5x(x-y)+(x-y)}$
$\text{=(5x+1)(x-y)}$
$\text{d, 2x(x+3)+(3+x)}$
$\text{=2x(x+3)+(x+3)}$
$\text{=(2x+1)(x+3)}$
Xin hay nhất ạ!