Verified answer

(2x-3)(2x+3)-x^2=12x-69-3x^2

4x^2-9-x^2-12x+69+3x^2=0

-12x+60=0

-12x=-60

x=-60\(-12)

x=5

Ответ:x=5

Verified answer

(2х-3)(2х+3)-х²=12х-69+3х²

4x²-9-x²=12x-69+3x²

12x=60

x=5