(x+2)*2+(2x-1)*2 (упростить)

Question

(x+2)*2+(2x-1)*2 (упростить)

Answer 1

=х^2+4х+4+4х^2-4х+1=5х^2+5

Answer 2

(x+2)ˇ2 + (2x-1)ˇ2 = xˇ2 +4x +4 +4xˇ2-4x+1=
=5xˇ2+5