5x2+4x=6

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Solution for 5x2+4x=6 equation:



5x^2+4x=6
We move all terms to the left:
5x^2+4x-(6)=0
a = 5; b = 4; c = -6;
Δ = b2-4ac
Δ = 42-4·5·(-6)
Δ = 136
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:
$\sqrt{\Delta}=\sqrt{136}=\sqrt{4*34}=\sqrt{4}*\sqrt{34}=2\sqrt{34}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(4)-2\sqrt{34}}{2*5}=\frac{-4-2\sqrt{34}}{10} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(4)+2\sqrt{34}}{2*5}=\frac{-4+2\sqrt{34}}{10} $

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