69.3626=3.14x^2

Solution for 69.3626=3.14x^2 equation:

69.3626=3.14x^2

We move all terms to the left:

69.3626-(3.14x^2)=0

We get rid of parentheses

-3.14x^2+69.3626=0

a = -3.14; b = 0; c = +69.3626;
Δ = b2-4ac
Δ = 02-4·(-3.14)·69.3626
Δ = 871.194256
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{871.194256}}{2*-3.14}=\frac{0-\sqrt{871.194256}}{-6.28}
=-\frac{\sqrt{}}{-6.28}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{871.194256}}{2*-3.14}=\frac{0+\sqrt{871.194256}}{-6.28}
=\frac{\sqrt{}}{-6.28}
$