Question

observe a equacao a seguir ×(×-2) = 2(×+6) . uma das raizes dessa equacao e o numero :

Answer 1

x²-2x=2x+12=0
x²-4x-12=0
Δ=-4²-4.a.c
Δ= 16-(-48)
Δ=64

x'=-b+√64/2
x'=4+8/2
x'= 6

x''= -b-√64 /2
x''= 4-8/2
x''= -2