Question

x²+6x+9=0 poderiam me responder toda? agradeço.

Answer 1

x² + 6x + 9 = 0


∆ = 6² - 4.1.9
∆ = 36 - 36
∆ = 0


x = -6 ± √0/2.1

x = -6 ± 0/2 = -6/2 = -3


S={ -3 }