Question

Calculo (x+5).(5x+y+2)

Answer 1

Solução:

$\mathsf{\left(x+5\right)\cdot \left(5x+y+2\right)=}\\\\\mathsf{\left(x\cdot 5x\right)+\left(x\cdot y\right)+\left(x\cdot 2\right)+\left(5\cdot 5x\right)+\left(5\cdot y\right)+\left(5\cdot 2\right)=}\\\\\mathsf{5x^2+xy+2x+25x+5y+10=}\\\\\boxed{\mathsf{5x^2+xy+27x+5y+10}}\: \: \checkmark$