-4x^2-4x-15=0

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Solution for -4x^2-4x-15=0 equation: 



-4x^2-4x-15=0

a = -4; b = -4; c = -15;
Δ = b2-4ac
Δ = -42-4·(-4)·(-15)
Δ = -224
Delta is less than zero, so there is no solution for the equation

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