Question

Equaçao do 2 grau:
x²+7x=+16

Answer 1

$x^2+7x=16\\\\x^2+7x-16=0\\\\\Delta=b^2-4ac\\\\\Delta=7^2-4(1)(-16)\\\Delta=49+64\\\Delta=113\\\\x=\frac{-7~\pm~\sqrt{113}}{2}$