8x2-6x-5=0

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Solution for 8x2-6x-5=0 equation:



8x^2-6x-5=0
a = 8; b = -6; c = -5;
Δ = b2-4ac
Δ = -62-4·8·(-5)
Δ = 196
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{196}=14$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-6)-14}{2*8}=\frac{-8}{16} =-1/2 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-6)+14}{2*8}=\frac{20}{16} =1+1/4 $

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