x^2+22x+30=0

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Solution for x^2+22x+30=0 equation:



x^2+22x+30=0
a = 1; b = 22; c = +30;
Δ = b2-4ac
Δ = 222-4·1·30
Δ = 364
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:
$\sqrt{\Delta}=\sqrt{364}=\sqrt{4*91}=\sqrt{4}*\sqrt{91}=2\sqrt{91}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(22)-2\sqrt{91}}{2*1}=\frac{-22-2\sqrt{91}}{2} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(22)+2\sqrt{91}}{2*1}=\frac{-22+2\sqrt{91}}{2} $

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