x+4x+5x2=3

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Solution for x+4x+5x2=3 equation:



x+4x+5x^2=3
We move all terms to the left:
x+4x+5x^2-(3)=0
We add all the numbers together, and all the variables
5x^2+5x-3=0
a = 5; b = 5; c = -3;
Δ = b2-4ac
Δ = 52-4·5·(-3)
Δ = 85
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(5)-\sqrt{85}}{2*5}=\frac{-5-\sqrt{85}}{10} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+\sqrt{85}}{2*5}=\frac{-5+\sqrt{85}}{10} $

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