4x+8x-5x2=0

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Solution for 4x+8x-5x2=0 equation:



4x+8x-5x^2=0
We add all the numbers together, and all the variables
-5x^2+12x=0
a = -5; b = 12; c = 0;
Δ = b2-4ac
Δ = 122-4·(-5)·0
Δ = 144
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{144}=12$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(12)-12}{2*-5}=\frac{-24}{-10} =2+2/5 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(12)+12}{2*-5}=\frac{0}{-10} =0 $

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