Question

Resolva as equações do 2° grau incompletas e determine x' e x''
a) 3x²=0
b) 4x²=36

Answer 1

a)

$3x^2=0\ \to\ x^2=0\ \to\ \boxed{x'=0}\ \text{e}\ \boxed{x''=0}$

b)

$4x^2=36\ \to\ x^2=9\ \to\ x=\pm3\ \to\ \boxed{x'=-3}\ \text{e}\ \boxed{x''=3}$