Question

5x^2+7x=-2

Answer 1

If you want to solve x, us the quadratic equation.
\[ax ^{2}+bx+c=0\]
\[x=\frac{ -b \pm \sqrt{b ^{2}-4ac} }{ 2a }\]

Answer 2

you can do it that way or factor it. what do you want to do?