Question

Qual é a raiz de 5x²-20=0

Answer 1

5x² - 20 = 0

5x² = 0 + 20

5x² = 20

x²= 20/5

x²= 4

x= ± √4

x= ± 2

S= ( 2 , - 2)

Answer 2

5x² - 20 = 0

5x² = 20

x² = 20/5

x² = 4

x = 2 ou x = -2