x^2+x^2=7.3^2

Solution for x^2+x^2=7.3^2 equation:

x^2+x^2=7.3^2

We move all terms to the left:

x^2+x^2-(7.3^2)=0

We add all the numbers together, and all the variables

2x^2-53.29=0

a = 2; b = 0; c = -53.29;
Δ = b2-4ac
Δ = 02-4·2·(-53.29)
Δ = 426.32
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{426.32}}{2*2}=\frac{0-\sqrt{426.32}}{4}
=-\frac{\sqrt{}}{4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{426.32}}{2*2}=\frac{0+\sqrt{426.32}}{4}
=\frac{\sqrt{}}{4}
$