15x^2-66x-24=0

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Solution for 15x^2-66x-24=0 equation:



15x^2-66x-24=0
a = 15; b = -66; c = -24;
Δ = b2-4ac
Δ = -662-4·15·(-24)
Δ = 5796
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:
$\sqrt{\Delta}=\sqrt{5796}=\sqrt{36*161}=\sqrt{36}*\sqrt{161}=6\sqrt{161}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-66)-6\sqrt{161}}{2*15}=\frac{66-6\sqrt{161}}{30} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-66)+6\sqrt{161}}{2*15}=\frac{66+6\sqrt{161}}{30} $

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