5y^2-15-24y=0

Solution for 5y^2-15-24y=0 equation:

5y^2-15-24y=0

a = 5; b = -24; c = -15;
Δ = b2-4ac
Δ = -242-4·5·(-15)
Δ = 876
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{876}=\sqrt{4*219}=\sqrt{4}*\sqrt{219}=2\sqrt{219}$
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-24)-2\sqrt{219}}{2*5}=\frac{24-2\sqrt{219}}{10}
$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-24)+2\sqrt{219}}{2*5}=\frac{24+2\sqrt{219}}{10}
$