9d^2-18d=0

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Solution for 9d^2-18d=0 equation: 



9d^2-18d=0

a = 9; b = -18; c = 0;
Δ = b2-4ac
Δ = -182-4·9·0
Δ = 324
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$d_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$d_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{324}=18$


$d_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-18)-18}{2*9}=\frac{0}{18}
=0
$


$d_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-18)+18}{2*9}=\frac{36}{18}
=2
$

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