x-4/x+5=8/2

Solution for x-4/x+5=8/2 equation:

x-4/x+5=8/2

We move all terms to the left:

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


Domain of the equation: x!=0

x∈R


We add all the numbers together, and all the variables

x-4/x+5-4=0

We add all the numbers together, and all the variables

x-4/x+1=0

We multiply all the terms by the denominator


x*x+1*x-4=0

We add all the numbers together, and all the variables

x+x*x-4=0

Wy multiply elements

x^2+x-4=0

a = 1; b = 1; c = -4;
Δ = b2-4ac
Δ = 12-4·1·(-4)
Δ = 17
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{-(1)-\sqrt{17}}{2*1}=\frac{-1-\sqrt{17}}{2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+\sqrt{17}}{2*1}=\frac{-1+\sqrt{17}}{2}
$