9y2-315y=0

Solution for 9y2-315y=0 equation:

9y^2-315y=0

a = 9; b = -315; c = 0;
Δ = b2-4ac
Δ = -3152-4·9·0
Δ = 99225
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{99225}=315$
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-315)-315}{2*9}=\frac{0}{18}
=0
$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-315)+315}{2*9}=\frac{630}{18}
=35
$