-5x^2=-2-10x

Solution for -5x^2=-2-10x equation:

-5x^2=-2-10x

We move all terms to the left:

-5x^2-(-2-10x)=0

We add all the numbers together, and all the variables

-5x^2-(-10x-2)=0

We get rid of parentheses

-5x^2+10x+2=0

a = -5; b = 10; c = +2;
Δ = b2-4ac
Δ = 102-4·(-5)·2
Δ = 140
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{140}=\sqrt{4*35}=\sqrt{4}*\sqrt{35}=2\sqrt{35}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(10)-2\sqrt{35}}{2*-5}=\frac{-10-2\sqrt{35}}{-10}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(10)+2\sqrt{35}}{2*-5}=\frac{-10+2\sqrt{35}}{-10}
$