Question

(x-1)^2×(x+2)-(x-2)×(x^2+2x+4). Giúp mình với😥😥😥

Answer 1

=(x^2-2x+1)(x+2)-x^3+8

=x^3+2x^2-2x^2-4x+x+2-x^3+8

=-3x+10

Answer 2

`(x-1)^2 .(x+2)-(x-2).(x^2+2x+4)`

`=x^2 -2x +1 .(x+2)- (x^3 +2x^2 +4x -2x^2 -4x-8)`

`=x^3 +2x^2 -2x^2 -4x +x+2-(x^3 -8)`

`=x^3 +2x^2 -2x^2 -4x+x+2-x^3 +8`

`=-3x+10`