12100=r2

Solution for 12100=r2 equation:

12100=r2

We move all terms to the left:

12100-(r2)=0

We add all the numbers together, and all the variables

-1r^2+12100=0

a = -1; b = 0; c = +12100;
Δ = b2-4ac
Δ = 02-4·(-1)·12100
Δ = 48400
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$r_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$r_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{48400}=220$
$r_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-220}{2*-1}=\frac{-220}{-2}
=+110
$
$r_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+220}{2*-1}=\frac{220}{-2}
=-110
$