Упростите вырожение (2x-1)^2+(2x-1)(2x+1)

Question

Упростите вырожение (2x-1)^2+(2x-1)(2x+1)

Answer 1

(2х-1)^2 + (2х-1) (2х+1) =
4х^2 - 4х + 1 + 4х^2 - 1 =
8х^2 - 4х = 4х ( 2х - 1 )