Subtract, simplify if possible:

v-8/v - 2v-13/5v

Question

Subtract, simplify if possible:

v-8/v - 2v-13/5v

saifoo.khan · Answer

$$\Large \frac{v-8}{v}-\frac{2v-13}{5v}$$
Like that?

anonymous · Answer

yep

saifoo.khan · Answer

take the LCM,

$$\Large \frac{5v(v-8)-v(2v-13)}{5v(v)}$$

anonymous · Answer

you can multiply the first factor by 5, so that you then have a common denominator for both... Don't forget to also multiply the top line by 5.
This gives you [5(v-8)/5v] - [2v-13 / 5v] and you can then use the same denominator, and subtract across the top line :)

anonymous · Answer

hmm feldy I think subtracting rational expressions is a little different than subtracting fractions. We have not had to do either of those things like you would with a regular fraction. I might be wrong though, it is all very confusing.

anonymous · Answer

Saifoo how did you find the LCM?

anonymous · Answer

OK my bad! Haven't dont this in a while haha

anonymous · Answer

its okay Im learning it for the first time. I am trying to use my book for help, however none of the example problems are quiet like this one.

saifoo.khan · Answer

do u know the basics of LCM?
i

anonymous · Answer

we learned them last week, however I was nnot very solid on that part, so throwing me into this was a nightmare

saifoo.khan · Answer

Do u wanna learn?

anonymous · Answer

I would love too

saifoo.khan · Answer

Let's finsid your confusions!

Come here!