2x-8/x=15

Solution for 2x-8/x=15 equation:

2x-8/x=15

We move all terms to the left:

2x-8/x-(15)=0


Domain of the equation: x!=0

x∈R


We multiply all the terms by the denominator


2x*x-15*x-8=0

We add all the numbers together, and all the variables

-15x+2x*x-8=0

Wy multiply elements

2x^2-15x-8=0

a = 2; b = -15; c = -8;
Δ = b2-4ac
Δ = -152-4·2·(-8)
Δ = 289
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{289}=17$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-15)-17}{2*2}=\frac{-2}{4}
=-1/2
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-15)+17}{2*2}=\frac{32}{4}
=8
$