3(5x2)=15x

Solution for 3(5x2)=15x equation:

3(5x^2)=15x

We move all terms to the left:

3(5x^2)-(15x)=0

a = 35; b = -15; c = 0;
Δ = b2-4ac
Δ = -152-4·35·0
Δ = 225
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{225}=15$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-15)-15}{2*35}=\frac{0}{70}
=0
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-15)+15}{2*35}=\frac{30}{70}
=3/7
$