x2-20x+10=0

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Solution for x2-20x+10=0 equation:



x2-20x+10=0
We add all the numbers together, and all the variables
x^2-20x+10=0
a = 1; b = -20; c = +10;
Δ = b2-4ac
Δ = -202-4·1·10
Δ = 360
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:
$\sqrt{\Delta}=\sqrt{360}=\sqrt{36*10}=\sqrt{36}*\sqrt{10}=6\sqrt{10}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-20)-6\sqrt{10}}{2*1}=\frac{20-6\sqrt{10}}{2} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-20)+6\sqrt{10}}{2*1}=\frac{20+6\sqrt{10}}{2} $

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