Question

36 = 4x ao quadrado......???/?/???//??

Answer 1

36 = 4x²
36/4 = x²
9 = x² 
± √9 = x

± 3 = x

x = ± 3

S = {-3 ; 3}

Answer 2

4x²=36
x²=36/4
x²=9
x=√9
x=3