Question

Socorro pessoal (13+x)²

Answer 1

(13+x)^2=
(13+x)(13+x)=
169+13x+13x+x^2=
x^2+26x+169

Answer 2

Boa noite!

(13 + x)²

quadrado da soma

13² + 2.13.x + x²

169 + 26x + x²

Bons estudos!