5x2-25x-30=0

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Solution for 5x2-25x-30=0 equation:



5x^2-25x-30=0
a = 5; b = -25; c = -30;
Δ = b2-4ac
Δ = -252-4·5·(-30)
Δ = 1225
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{1225}=35$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-25)-35}{2*5}=\frac{-10}{10} =-1 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-25)+35}{2*5}=\frac{60}{10} =6 $

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