10+5=15x2

Solution for 10+5=15x2 equation:

10+5=15x^2

We move all terms to the left:

10+5-(15x^2)=0

We add all the numbers together, and all the variables

-15x^2+15=0

a = -15; b = 0; c = +15;
Δ = b2-4ac
Δ = 02-4·(-15)·15
Δ = 900
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{900}=30$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-30}{2*-15}=\frac{-30}{-30}
=1
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+30}{2*-15}=\frac{30}{-30}
=-1
$