Question

Escreva as equações na forma geral e resolva
×(×-2)=2(×+6)

Answer 1

$x^{2} -2x=2x+12 \\ x^{2} -4x-12=0 \\ \\ 4^{2} -4 * 1 * -12 \\ -16+48 = 64 \\ \\ \frac{4-8}{2} = x_{1} = -4/2 = -2 \\ \\ \frac{4+8}{2} = x_{2} = 12/2 = 6$

x1 = -2
x2 = 6