25x-7.5x^2=0

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Solution for 25x-7.5x^2=0 equation:



25x-7.5x^2=0
a = -7.5; b = 25; c = 0;
Δ = b2-4ac
Δ = 252-4·(-7.5)·0
Δ = 625
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{625}=25$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(25)-25}{2*-7.5}=\frac{-50}{-15} =3+1/3 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(25)+25}{2*-7.5}=\frac{0}{-15} =0 $

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