Question

Resolva as equações de 2 grau x ao quadrado-7x=0

Answer 1

$\Large\boxed{\begin{array}{l}\sf x^2-7x=0\\\sf x\cdot(x-7)=0\\\sf x=0\\\sf x-7=0\\\sf x=7\\\sf S=\{0,7\}\end{array}}$