2x2+4x-6=0,x=

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Solution for 2x2+4x-6=0,x= equation:



2x^2+4x-6=0.x=
We move all terms to the left:
2x^2+4x-6-(0.x)=0
We add all the numbers together, and all the variables
2x^2+4x-6-0=0
We add all the numbers together, and all the variables
2x^2+4x-6=0
a = 2; b = 4; c = -6;
Δ = b2-4ac
Δ = 42-4·2·(-6)
Δ = 64
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{64}=8$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(4)-8}{2*2}=\frac{-12}{4} =-3 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(4)+8}{2*2}=\frac{4}{4} =1 $

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