Question

Desenvolva o produto notável e assinale a alternativa correta: (x + 4) . (x + 3) *​

Answer 1

Resposta:

$\left(x+4\right)\left(x+3\right)\\\\\mathrm{Aplique\:o\:metodo\:FOIL}:\quad \left(a+b\right)\left(c+d\right)=ac+ad+bc+bd\\\\a=x,\:b=4,\:c=x,\:d=3\\\\=xx+x\cdot \:3+4x+4\cdot \:3\\\\=xx+3x+4x+4\cdot \:3\\\\=x^2+7x+12$