4x2+48x+20=0

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Solution for 4x2+48x+20=0 equation:



4x^2+48x+20=0
a = 4; b = 48; c = +20;
Δ = b2-4ac
Δ = 482-4·4·20
Δ = 1984
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:
$\sqrt{\Delta}=\sqrt{1984}=\sqrt{64*31}=\sqrt{64}*\sqrt{31}=8\sqrt{31}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(48)-8\sqrt{31}}{2*4}=\frac{-48-8\sqrt{31}}{8} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(48)+8\sqrt{31}}{2*4}=\frac{-48+8\sqrt{31}}{8} $

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