8.73=x2*31.4

Solution for 8.73=x2*31.4 equation:

8.73=x2*31.4

We move all terms to the left:

8.73-(x2*31.4)=0

We add all the numbers together, and all the variables

-(+x2*31.4)+8.73=0

We get rid of parentheses

-x2*31.4+8.73=0

Wy multiply elements

-31.4x^2+8.73=0

a = -31.4; b = 0; c = +8.73;
Δ = b2-4ac
Δ = 02-4·(-31.4)·8.73
Δ = 1096.488
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{1096.488}}{2*-31.4}=\frac{0-\sqrt{1096.488}}{-62.8}
=-\frac{\sqrt{}}{-62.8}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{1096.488}}{2*-31.4}=\frac{0+\sqrt{1096.488}}{-62.8}
=\frac{\sqrt{}}{-62.8}
$