Question

calcule o valor de x, 3X2=75

Answer 1

3x² = 75
x² = 75/3
x² = 25
x = √25
x = 5

Answer 2

vamos lá...

3x² = 75
x²= 75 ÷ 3
x²= 25

x=±√25

x=± 5

logo x=+5 
        x= -5