Question

Resolva a equaçao : x² +6x =7

Answer 1

$x^2+6x=7\\ \\ x^2+6x-7=0$

a=1 b=6 c=-7

$delta = 6^2-4.1(-7)=36+28=64 \\ \\ \sqrt{delta} = \sqrt{64} =8 \\ \\ x_{1} = \frac{-6+8}{2} = \frac{2}{2} = 1 \\ \\ x_{2} = \frac{-6-8}{2} = \frac{-14}{2} =-7$

raízes

$x_{1}= 1 \\ \\ x_{2} =-7$