5x^2-18x+5=0

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Solution for 5x^2-18x+5=0 equation:



5x^2-18x+5=0
a = 5; b = -18; c = +5;
Δ = b2-4ac
Δ = -182-4·5·5
Δ = 224
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:
$\sqrt{\Delta}=\sqrt{224}=\sqrt{16*14}=\sqrt{16}*\sqrt{14}=4\sqrt{14}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-18)-4\sqrt{14}}{2*5}=\frac{18-4\sqrt{14}}{10} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-18)+4\sqrt{14}}{2*5}=\frac{18+4\sqrt{14}}{10} $

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