3/x-1/2x=4

Solution for 3/x-1/2x=4 equation:

3/x-1/2x=4

We move all terms to the left:

3/x-1/2x-(4)=0


Domain of the equation: x!=0

x∈R



Domain of the equation: 2x!=0

x!=0/2

x!=0

x∈R


We calculate fractions


6x/2x^2+(-x)/2x^2-4=0

We add all the numbers together, and all the variables

6x/2x^2+(-1x)/2x^2-4=0

We multiply all the terms by the denominator


6x+(-1x)-4*2x^2=0

Wy multiply elements

-8x^2+6x+(-1x)=0

We get rid of parentheses

-8x^2+6x-1x=0

We add all the numbers together, and all the variables

-8x^2+5x=0

a = -8; b = 5; c = 0;
Δ = b2-4ac
Δ = 52-4·(-8)·0
Δ = 25
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{25}=5$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(5)-5}{2*-8}=\frac{-10}{-16}
=5/8
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+5}{2*-8}=\frac{0}{-16}
=0
$