72x-8x^2=0

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Solution for 72x-8x^2=0 equation:



72x-8x^2=0
a = -8; b = 72; c = 0;
Δ = b2-4ac
Δ = 722-4·(-8)·0
Δ = 5184
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{5184}=72$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(72)-72}{2*-8}=\frac{-144}{-16} =+9 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(72)+72}{2*-8}=\frac{0}{-16} =0 $

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