(x+2)(x ^2-2x+4)-x(x+2)(x-2)=12

Question

(x+2)(x ^2-2x+4)-x(x+2)(x-2)=12

Answer 1

(x+2)*(x^2-2x+4-x*(x-2))=12
(x+2)*(x^2+4-x^2+2x)=12
(x+2)*4=12
4x+8=12
4x=12-8
4x=4
x=1