7x^2-35x-5=0

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Solution for 7x^2-35x-5=0 equation:



7x^2-35x-5=0
a = 7; b = -35; c = -5;
Δ = b2-4ac
Δ = -352-4·7·(-5)
Δ = 1365
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-35)-\sqrt{1365}}{2*7}=\frac{35-\sqrt{1365}}{14} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-35)+\sqrt{1365}}{2*7}=\frac{35+\sqrt{1365}}{14} $

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