-8x^2-8x=0

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Solution for -8x^2-8x=0 equation: 



-8x^2-8x=0

a = -8; b = -8; c = 0;
Δ = b2-4ac
Δ = -82-4·(-8)·0
Δ = 64
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{64}=8$


$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-8)-8}{2*-8}=\frac{0}{-16}
=0
$


$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-8)+8}{2*-8}=\frac{16}{-16}
=-1
$

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