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
\(x\left(x-2\right)=2\left(x-5\right)+2x\left(x-5\right)\left(x-2\right)\)
We now get a quadratic.
We get
\(x^2-2x=2x^3-14x^2+22x-10\\ 2x^3-15x^2+24x-10=0\)
This where it gets tricky. There are no integer roots for this equation.
We could use the Newton-Raphson equation, and we eventually get
\(x\approx \:0.67798\dots ,\:x\approx \:1.34697\dots ,\:x\approx \:5.47503\dots \)
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
\(x\left(x-2\right)=2\left(x-5\right)+2x\left(x-5\right)\left(x-2\right)\)
We now get a quadratic.
We get
\(x^2-2x=2x^3-14x^2+22x-10\\ 2x^3-15x^2+24x-10=0\)
This where it gets tricky. There are no integer roots for this equation.
We could use the Newton-Raphson equation, and we eventually get
\(x\approx \:0.67798\dots ,\:x\approx \:1.34697\dots ,\:x\approx \:5.47503\dots \)
I hope this was clear enough!
Thanks! :)