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y2-625y-375=0
We add all the numbers together, and all the variables
y^2-625y-375=0
a = 1; b = -625; c = -375;
Δ = b2-4ac
Δ = -6252-4·1·(-375)
Δ = 392125
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}$$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{392125}=\sqrt{25*15685}=\sqrt{25}*\sqrt{15685}=5\sqrt{15685}$$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-625)-5\sqrt{15685}}{2*1}=\frac{625-5\sqrt{15685}}{2} $$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-625)+5\sqrt{15685}}{2*1}=\frac{625+5\sqrt{15685}}{2} $
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