Question

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x(x-2)=2(x+6)​

Answer 1

x(x-2) = 2(x+6)

x² - 2x = 2x + 12

x² - 4x - 12 = 0

Δ = b² - 4 a c

Δ = 16 + 48

Δ = 64

x =  - b ± √Δ

      ______

          2a

x' = 

x' =

x' =  = 6

x" =

x" = 

x" =  = - 2

Resposta: X = 6 ou X = - 2