-10-4x^2=-320

Solution for -10-4x^2=-320 equation:

-10-4x^2=-320

We move all terms to the left:

-10-4x^2-(-320)=0

We add all the numbers together, and all the variables

-4x^2+310=0

a = -4; b = 0; c = +310;
Δ = b2-4ac
Δ = 02-4·(-4)·310
Δ = 4960
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:

$\sqrt{\Delta}=\sqrt{4960}=\sqrt{16*310}=\sqrt{16}*\sqrt{310}=4\sqrt{310}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-4\sqrt{310}}{2*-4}=\frac{0-4\sqrt{310}}{-8}
=-\frac{4\sqrt{310}}{-8}
=-\frac{\sqrt{310}}{-2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+4\sqrt{310}}{2*-4}=\frac{0+4\sqrt{310}}{-8}
=\frac{4\sqrt{310}}{-8}
=\frac{\sqrt{310}}{-2}
$