18x2-3X-6=0

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Solution for 18x2-3X-6=0 equation:



18x^2-3x-6=0
a = 18; b = -3; c = -6;
Δ = b2-4ac
Δ = -32-4·18·(-6)
Δ = 441
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{441}=21$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-3)-21}{2*18}=\frac{-18}{36} =-1/2 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-3)+21}{2*18}=\frac{24}{36} =2/3 $

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