Find all values of x such that
\frac{x}{x - 5} = \frac{4}{2x - 4} + 2x
First, we want to get rid of the deniminators. We can do this by multiplying both sides by the LCM of the denominators.
The LCM is (x-5)(x-2).
We have
x(x−2)=2(x−5)+2x(x−5)(x−2)
We now get a quadratic.
We get
x2−2x=2x3−14x2+22x−102x3−15x2+24x−10=0
This where it gets tricky. There are no integer roots for this equation.
We could use the Newton-Raphson equation, and we eventually get
x≈0.67798…,x≈1.34697…,x≈5.47503…
I hope this was clear enough!
Thanks! :)
First, we want to get rid of the deniminators. We can do this by multiplying both sides by the LCM of the denominators.
The LCM is (x-5)(x-2).
We have
x(x−2)=2(x−5)+2x(x−5)(x−2)
We now get a quadratic.
We get
x2−2x=2x3−14x2+22x−102x3−15x2+24x−10=0
This where it gets tricky. There are no integer roots for this equation.
We could use the Newton-Raphson equation, and we eventually get
x≈0.67798…,x≈1.34697…,x≈5.47503…
I hope this was clear enough!
Thanks! :)