Question

а=Х+2
в=2х-3
Найдите:
(а+в)²
(а-в)²
(а-в)

Answer 1

(a+b)^2=(x+2+2x-3)^2=(3x-1)^2=
=9x^2-6x+1;

(a-b)^2=(x+2-2x+3)^2=(5-x)^2=
=25-10x+x^2;

(a-b)=(x+2-2x+3)=(5-x).