2x-15/x=3

Solution for 2x-15/x=3 equation:

2x-15/x=3

We move all terms to the left:

2x-15/x-(3)=0


Domain of the equation: x!=0

x∈R


We multiply all the terms by the denominator


2x*x-3*x-15=0

We add all the numbers together, and all the variables

-3x+2x*x-15=0

Wy multiply elements

2x^2-3x-15=0

a = 2; b = -3; c = -15;
Δ = b2-4ac
Δ = -32-4·2·(-15)
Δ = 129
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-3)-\sqrt{129}}{2*2}=\frac{3-\sqrt{129}}{4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-3)+\sqrt{129}}{2*2}=\frac{3+\sqrt{129}}{4}
$