Question

4x ao quadrado - 12x=0

Answer 1

4x² - 12x = 0

Δ = 144 - 0
Δ = 144

x = 12 +-√144/8
x = 12 +-12/8

x' = 12+12/8
x' = 24/8 = 3

x'' = 12-12/8
x'' = 0/8 = 0              ok