Question

ME AJUDEM POR FAVOR ISSO E PARA AMANHÃ
x (x-2)=2 (x+6)​

Answer 1

$x.(x-2)~=~2.(x+6)\\\\\\x\,.\,x~-~x\,.\,2~=~2\,.\,x~+~2\,.\,6\\\\\\x^2~-~2x~=~2x~+~12\\\\\\\boxed{x^2~-~4x~-~12~=~0}\\\\\\Aplicando~Bhaskara\\\\\\\Delta~=~(-4)^2-4.1.(-12)~=~16+48~=~\boxed{64}\\\\\\x'~=~\frac{4+\sqrt{64}}{2~.~1}~=~\frac{4+8}{2}~=~\frac{12}{2}~=~\boxed{6}\\\\\\x''~=~\frac{4-\sqrt{64}}{2~.~1}~=~\frac{4-8}{2}~=~\frac{-4}{2}~=~\boxed{-2}$