j2-39j=0

Solution for j2-39j=0 equation:

j2-39j=0

We add all the numbers together, and all the variables

j^2-39j=0

a = 1; b = -39; c = 0;
Δ = b2-4ac
Δ = -392-4·1·0
Δ = 1521
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$j_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$j_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{1521}=39$
$j_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-39)-39}{2*1}=\frac{0}{2}
=0
$
$j_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-39)+39}{2*1}=\frac{78}{2}
=39
$