10x2+81x+8=0

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Solution for 10x2+81x+8=0 equation:



10x^2+81x+8=0
a = 10; b = 81; c = +8;
Δ = b2-4ac
Δ = 812-4·10·8
Δ = 6241
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{6241}=79$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(81)-79}{2*10}=\frac{-160}{20} =-8 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(81)+79}{2*10}=\frac{-2}{20} =-1/10 $

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