4y-2y^2=-10

Solution for 4y-2y^2=-10 equation:

4y-2y^2=-10

We move all terms to the left:

4y-2y^2-(-10)=0

We add all the numbers together, and all the variables

-2y^2+4y+10=0

a = -2; b = 4; c = +10;
Δ = b2-4ac
Δ = 42-4·(-2)·10
Δ = 96
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{96}=\sqrt{16*6}=\sqrt{16}*\sqrt{6}=4\sqrt{6}$
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(4)-4\sqrt{6}}{2*-2}=\frac{-4-4\sqrt{6}}{-4}
$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(4)+4\sqrt{6}}{2*-2}=\frac{-4+4\sqrt{6}}{-4}
$