5X*3y=100

Solution for 5X*3y=100 equation:

5X*3X=100

We move all terms to the left:

5X*3X-(100)=0

Wy multiply elements

15X^2-100=0

a = 15; b = 0; c = -100;
Δ = b2-4ac
Δ = 02-4·15·(-100)
Δ = 6000
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{6000}=\sqrt{400*15}=\sqrt{400}*\sqrt{15}=20\sqrt{15}$
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-20\sqrt{15}}{2*15}=\frac{0-20\sqrt{15}}{30}
=-\frac{20\sqrt{15}}{30}
=-\frac{2\sqrt{15}}{3}
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+20\sqrt{15}}{2*15}=\frac{0+20\sqrt{15}}{30}
=\frac{20\sqrt{15}}{30}
=\frac{2\sqrt{15}}{3}
$