Question

Me ajudem x (x+6)=72

Answer 1

x.(x+6) = 72

x² + 6x = 72

x² + 6x - 72 = 0

∆ = 36 - 4.1.(-72)

∆ = 36 + 288

∆ = 18

x' = (-6+18)/2

x' = 12/2

x' = 6

x" = (-6-18)/2

x" = -24/2

x" = -12