2y^2+6y-600=0

Solution for 2y^2+6y-600=0 equation:

2y^2+6y-600=0

a = 2; b = 6; c = -600;
Δ = b2-4ac
Δ = 62-4·2·(-600)
Δ = 4836
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:

$\sqrt{\Delta}=\sqrt{4836}=\sqrt{4*1209}=\sqrt{4}*\sqrt{1209}=2\sqrt{1209}$
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(6)-2\sqrt{1209}}{2*2}=\frac{-6-2\sqrt{1209}}{4}
$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(6)+2\sqrt{1209}}{2*2}=\frac{-6+2\sqrt{1209}}{4}
$