Question

Ultilizando produtos notáveis, resolva e simplifique (x+3).(x-3)

Answer 1

$\large\boxed{\begin{array}{l}\underline{\rm Produto\,da\,soma}\\\underline{\rm pela\,diferenc_{\!\!,}a\,de\,dois\,termos}\\\huge\boxed{\boxed{\boxed{\boxed{\sf (a+b)\cdot(a-b)=a^2-b^2}}}}\\\\\sf (x+3)\cdot(x-3)=(x)^2-3^2\\\sf (x+3)\cdot(x-3)=x^2-9\end{array}}$