Question

Gửi giúp mik vs ạ

Answer 1

a: \(=x^2-5x+6+4-x^2=-5x+10=-5\left(x-2\right)\)

Answer 2

Lời giải:
$(x-2)(x-3)+4-x^2=(x-2)(x-3)-(x^2-4)$

$=(x-2)(x-3)-(x-2)(x+2)=(x-2)[(x-3)-(x+2)]=(x-2)(-5)=-5(x-2)=5(2-x)$