Упростить 1) (х-1)^2 +(2х+1)^2 ;2)(3-4у)×(4у+3);3)(3-а)×(9+3а+а^2);4)(2а+3)^3

Question

Упростить 1) (х-1)^2 +(2х+1)^2 ;2)(3-4у)×(4у+3);3)(3-а)×(9+3а+а^2);4)(2а+3)^3

Answer 1

1) х^2-2х+1^2+4х^2+4х+1^2=
=5х^2+2х+2
2)12у+9-16у^2-12у=9-16х^2
3) 27+9а+3а^2-9а-3а^2-а^3=27-а^3