3.4^2+5.7^2=x^2

Solution for 3.4^2+5.7^2=x^2 equation:

3.4^2+5.7^2=x^2

We move all terms to the left:

3.4^2+5.7^2-(x^2)=0

We add all the numbers together, and all the variables

-1x^2+44.05=0

a = -1; b = 0; c = +44.05;
Δ = b2-4ac
Δ = 02-4·(-1)·44.05
Δ = 176.2
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-\sqrt{176.2}}{2*-1}=\frac{0-\sqrt{176.2}}{-2}
=-\frac{\sqrt{}}{-2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{176.2}}{2*-1}=\frac{0+\sqrt{176.2}}{-2}
=\frac{\sqrt{}}{-2}
$