Question

5x ao quadrado menos 15 igual a 0

Answer 1

5x² - 15 = 0

5x² = 15

x² = 15/5

x² = 3

x = raiz(3) ou x = - raiz(3)

Answer 2

5x² - 15 = 0

5x²= 0 + 15

5x²= 15

x²= 15/5

x²= 3

x= ± √3

S= ( √3 ; - √3)