Y=-x^2-8x-16

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Solution for Y=-x^2-8x-16 equation: 



=-Y^2-8Y-16

We move all terms to the left:

-(-Y^2-8Y-16)=0

We get rid of parentheses

Y^2+8Y+16=0

a = 1; b = 8; c = +16;
Δ = b2-4ac
Δ = 82-4·1·16
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$Y=\frac{-b}{2a}=\frac{-8}{2}=-4$

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