39*39=x*x*36*36

Solution for 39*39=x*x*36*36 equation:

39*39=x*x*36*36

We move all terms to the left:

39*39-(x*x*36*36)=0

We add all the numbers together, and all the variables

-(+x*x*36*36)+39*39=0

We add all the numbers together, and all the variables

-(+x*x*36*36)+1521=0

We get rid of parentheses

-x*x*36*36+1521=0

Wy multiply elements

-1296x^2*3+1521=0

Wy multiply elements

-3888x^2+1521=0

a = -3888; b = 0; c = +1521;
Δ = b2-4ac
Δ = 02-4·(-3888)·1521
Δ = 23654592
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:

$\sqrt{\Delta}=\sqrt{23654592}=\sqrt{7884864*3}=\sqrt{7884864}*\sqrt{3}=2808\sqrt{3}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-2808\sqrt{3}}{2*-3888}=\frac{0-2808\sqrt{3}}{-7776}
=-\frac{2808\sqrt{3}}{-7776}
=-\frac{13\sqrt{3}}{-36}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+2808\sqrt{3}}{2*-3888}=\frac{0+2808\sqrt{3}}{-7776}
=\frac{2808\sqrt{3}}{-7776}
=\frac{13\sqrt{3}}{-36}
$