70=50x^2

Solution for 70=50x^2 equation:

70=50x^2

We move all terms to the left:

70-(50x^2)=0

a = -50; b = 0; c = +70;
Δ = b2-4ac
Δ = 02-4·(-50)·70
Δ = 14000
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:

$\sqrt{\Delta}=\sqrt{14000}=\sqrt{400*35}=\sqrt{400}*\sqrt{35}=20\sqrt{35}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-20\sqrt{35}}{2*-50}=\frac{0-20\sqrt{35}}{-100}
=-\frac{20\sqrt{35}}{-100}
=-\frac{\sqrt{35}}{-5}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+20\sqrt{35}}{2*-50}=\frac{0+20\sqrt{35}}{-100}
=\frac{20\sqrt{35}}{-100}
=\frac{\sqrt{35}}{-5}
$