Question

Решите пожалуйста




(x-2)(x+4)-2x(1+x)

Answer 1

$(x-2)(x+4)-2x(1+x)= x^{2} +4x-2x-8-2x-2 x^{2} =\\\\= x^{2} -2 x^{2} +4x-2x-2x-8=- x^{2} -8$

Answer 2

(x-2)(x+4)-2x(1+x)=x^2+4x-2x-8-2x-2x^2=-x^2-8