Question

26)Calculeaza :
a) (a+2) la puterea 2 +(a-2) la puterea 2 +(a-1) la puterea 2+(a+1) la puterea 2
b)(2x+3) la puterea 2+ (2x+1) la puterea 2+(2x+1) la puterea 2+(2x+3) la puterea 2

Answer 1

a) a la puterea 2 +2ab+a la patrat -2ab+b patrat+a patrat -2a+1+a patrat +2a+1=
=4a patrat +2b patrat +2