(3/x-1)-(1/x+1)=3x

Solution for (3/x-1)-(1/x+1)=3x equation:

(3/x-1)-(1/x+1)=3x

We move all terms to the left:

(3/x-1)-(1/x+1)-(3x)=0


Domain of the equation: x-1)!=0

x∈R



Domain of the equation: x+1)!=0

x∈R


We add all the numbers together, and all the variables

-3x+(3/x-1)-(1/x+1)=0

We get rid of parentheses

-3x+3/x-1/x-1-1=0

We multiply all the terms by the denominator


-3x*x-1*x-1*x+3-1=0

We add all the numbers together, and all the variables

-2x-3x*x+2=0

Wy multiply elements

-3x^2-2x+2=0

a = -3; b = -2; c = +2;
Δ = b2-4ac
Δ = -22-4·(-3)·2
Δ = 28
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:

$\sqrt{\Delta}=\sqrt{28}=\sqrt{4*7}=\sqrt{4}*\sqrt{7}=2\sqrt{7}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-2)-2\sqrt{7}}{2*-3}=\frac{2-2\sqrt{7}}{-6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-2)+2\sqrt{7}}{2*-3}=\frac{2+2\sqrt{7}}{-6}
$