-3y(y+1)=15

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Solution for -3y(y+1)=15 equation: 



-3y(y+1)=15

We move all terms to the left:

-3y(y+1)-(15)=0

We multiply parentheses

-3y^2-3y-15=0

a = -3; b = -3; c = -15;
Δ = b2-4ac
Δ = -32-4·(-3)·(-15)
Δ = -171
Delta is less than zero, so there is no solution for the equation

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