X^2=20000000y

Solution for X^2=20000000y equation:

X^2=20000000X

We move all terms to the left:

X^2-(20000000X)=0

a = 1; b = -20000000; c = 0;
Δ = b2-4ac
Δ = -200000002-4·1·0
Δ = 400000000000000
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{400000000000000}=20000000$
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-20000000)-20000000}{2*1}=\frac{0}{2}
=0
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-20000000)+20000000}{2*1}=\frac{40000000}{2}
=20000000
$