10x2+15x-5=0

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Solution for 10x2+15x-5=0 equation:



10x^2+15x-5=0
a = 10; b = 15; c = -5;
Δ = b2-4ac
Δ = 152-4·10·(-5)
Δ = 425
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:
$\sqrt{\Delta}=\sqrt{425}=\sqrt{25*17}=\sqrt{25}*\sqrt{17}=5\sqrt{17}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(15)-5\sqrt{17}}{2*10}=\frac{-15-5\sqrt{17}}{20} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(15)+5\sqrt{17}}{2*10}=\frac{-15+5\sqrt{17}}{20} $

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