Question

упростите пример
(x-2)(x+2)-x(x-3)
(a+3)^+(a-8)(a+2)

Answer 1

(x-2)(x+2)-x(x-3)=x^2-4-x^2+3x=3x-4
(a+3)^2+(a-8)(a+2)=a^2+6a+9+a^2-8a+2a-16=2a^2-7