8x(-2x-3)=9

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Solution for 8x(-2x-3)=9 equation: 



8x(-2x-3)=9

We move all terms to the left:

8x(-2x-3)-(9)=0

We multiply parentheses

-16x^2-24x-9=0

a = -16; b = -24; c = -9;
Δ = b2-4ac
Δ = -242-4·(-16)·(-9)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{24}{-32}=-3/4$

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