Question

Solve for $y$:
$5y^2+5y-10=0$

Answer 1

$5y^2+5y-10=0$

$y=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

$y=\frac{-5\pm \sqrt{25-4\left(5\right)(-10)}}{2\left(5\right)}$

$y=\frac{-5\pm \sqrt{225}}{10}=\frac{-5\pm 15}{10}$

$y=-2$ or $1$.