1/2x-1/x=9

Solution for 1/2x-1/x=9 equation:

1/2x-1/x=9

We move all terms to the left:

1/2x-1/x-(9)=0


Domain of the equation: 2x!=0

x!=0/2

x!=0

x∈R



Domain of the equation: x!=0

x∈R


We calculate fractions


x/2x^2+(-2x)/2x^2-9=0

We multiply all the terms by the denominator


x+(-2x)-9*2x^2=0

Wy multiply elements

-18x^2+x+(-2x)=0

We get rid of parentheses

-18x^2+x-2x=0

We add all the numbers together, and all the variables

-18x^2-1x=0

a = -18; b = -1; c = 0;
Δ = b2-4ac
Δ = -12-4·(-18)·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*-18}=\frac{0}{-36}
=0
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-1)+1}{2*-18}=\frac{2}{-36}
=-1/18
$