5/2x-4=2/x

Solution for 5/2x-4=2/x equation:

5/2x-4=2/x

We move all terms to the left:

5/2x-4-(2/x)=0


Domain of the equation: 2x!=0

x!=0/2

x!=0

x∈R



Domain of the equation: x)!=0

x!=0/1

x!=0

x∈R


We add all the numbers together, and all the variables

5/2x-(+2/x)-4=0

We get rid of parentheses

5/2x-2/x-4=0

We calculate fractions


5x/2x^2+(-4x)/2x^2-4=0

We multiply all the terms by the denominator


5x+(-4x)-4*2x^2=0

Wy multiply elements

-8x^2+5x+(-4x)=0

We get rid of parentheses

-8x^2+5x-4x=0

We add all the numbers together, and all the variables

-8x^2+x=0

a = -8; b = 1; c = 0;
Δ = b2-4ac
Δ = 12-4·(-8)·0
Δ = 1
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{1}=1$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1)-1}{2*-8}=\frac{-2}{-16}
=1/8
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+1}{2*-8}=\frac{0}{-16}
=0
$