(3-2х)^2-(5+2x)(2x+1)=-20

Question

(3-2х)^2-(5+2x)(2x+1)=-20

Answer 1

9-12x+4x^2-(10x+5+4x^2+2x)=-20

4x^2-4x^2-12x-10x-2x+9-5+20=0

-24x+24=0

-24x=-24

x=1


Ответ: 1