Question

преобразуйте многочлен в выражение (x-1)^2-2(x-2)(x-1)

Answer 1

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

Answer 2

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