12.92=130*x*60*x

Solution for 12.92=130*x*60*x equation:

12.92=130x*60x

We move all terms to the left:

12.92-(130x*60x)=0

We add all the numbers together, and all the variables

-(+130x*60x)+12.92=0

We get rid of parentheses

-130x*60x+12.92=0

Wy multiply elements

-7800x^2+12.92=0

a = -7800; b = 0; c = +12.92;
Δ = b2-4ac
Δ = 02-4·(-7800)·12.92
Δ = 403104
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:

$\sqrt{\Delta}=\sqrt{403104}=\sqrt{16*25194}=\sqrt{16}*\sqrt{25194}=4\sqrt{25194}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-4\sqrt{25194}}{2*-7800}=\frac{0-4\sqrt{25194}}{-15600}
=-\frac{4\sqrt{25194}}{-15600}
=-\frac{\sqrt{25194}}{-3900}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+4\sqrt{25194}}{2*-7800}=\frac{0+4\sqrt{25194}}{-15600}
=\frac{4\sqrt{25194}}{-15600}
=\frac{\sqrt{25194}}{-3900}
$