121=36x^2

Solution for 121=36x^2 equation:

121=36x^2

We move all terms to the left:

121-(36x^2)=0

a = -36; b = 0; c = +121;
Δ = b2-4ac
Δ = 02-4·(-36)·121
Δ = 17424
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{17424}=132$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-132}{2*-36}=\frac{-132}{-72}
=1+5/6
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+132}{2*-36}=\frac{132}{-72}
=-1+5/6
$