Question

Me ajudem a resolver
(y+ 3x)²

Answer 1

Resposta:

y²+ 2yx + 3x²

Explicação:

(y+3x)² = y^2+6xy+9x²

quadrado da soma de dois termos.

(a+b)²=a²+2ab+b²

Answer 2

$\Large\boxed{\begin{array}{l}\underline{\rm Quadrado\,da\,soma\,de\,2\,termos}\\\sf (a+b)^2=a^2+2ab+b^2\\\sf (y+3x)^2=y^2+2\cdot y\cdot3x+(3x)^2\\\sf (y+3x)^2=y^2+6xy+9x^2\end{array}}$