55^2+x^2=172^2

Solution for 55^2+x^2=172^2 equation:

55^2+x^2=172^2

We move all terms to the left:

55^2+x^2-(172^2)=0

We add all the numbers together, and all the variables

x^2-26559=0

a = 1; b = 0; c = -26559;
Δ = b2-4ac
Δ = 02-4·1·(-26559)
Δ = 106236
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:

$\sqrt{\Delta}=\sqrt{106236}=\sqrt{36*2951}=\sqrt{36}*\sqrt{2951}=6\sqrt{2951}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-6\sqrt{2951}}{2*1}=\frac{0-6\sqrt{2951}}{2}
=-\frac{6\sqrt{2951}}{2}
=-3\sqrt{2951}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+6\sqrt{2951}}{2*1}=\frac{0+6\sqrt{2951}}{2}
=\frac{6\sqrt{2951}}{2}
=3\sqrt{2951}
$