Помогитеупростите (x-2)²-(x-1) (x+2)

Question

Помогите
упростите
(x-2)²-(x-1) (x+2)

Answer 1

(x^2-4x+4) - (x^2+2x-x-2) = -5x + 6

Answer 2

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