Question

Resolva as equaçoes do 2°: ×ao quadrado=×+12

Answer 1

x ² = x +12
x² - x - 12 = 0

∆= 1 + 48
∆ = 49


x' = 1 + 7 / 2
x' = 4


x" = 1-7 /2
x" = -3


S={-3,4}



att: Jhonny.