39=x2/5.2

Solution for 39=x2/5.2 equation:

39=x2/5.2

We move all terms to the left:

39-(x2/5.2)=0

We add all the numbers together, and all the variables

-(+x2/5.2)+39=0

We get rid of parentheses

-x2/5.2+39=0

We multiply all the terms by the denominator


-x2+39*5.2=0

We add all the numbers together, and all the variables

-1x^2+202.8=0

a = -1; b = 0; c = +202.8;
Δ = b2-4ac
Δ = 02-4·(-1)·202.8
Δ = 811.2
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{811.2}}{2*-1}=\frac{0-\sqrt{811.2}}{-2}
=-\frac{\sqrt{}}{-2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{811.2}}{2*-1}=\frac{0+\sqrt{811.2}}{-2}
=\frac{\sqrt{}}{-2}
$