7x^2+35x+35=0

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Solution for 7x^2+35x+35=0 equation:



7x^2+35x+35=0
a = 7; b = 35; c = +35;
Δ = b2-4ac
Δ = 352-4·7·35
Δ = 245
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:
$\sqrt{\Delta}=\sqrt{245}=\sqrt{49*5}=\sqrt{49}*\sqrt{5}=7\sqrt{5}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(35)-7\sqrt{5}}{2*7}=\frac{-35-7\sqrt{5}}{14} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(35)+7\sqrt{5}}{2*7}=\frac{-35+7\sqrt{5}}{14} $

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