Given: f(x)= x+2 and h(x)= 1/x-1

find 2f(x)-h(x)

All you have to do here is replace f(x) with x + 2 and h(x) with 1/x-1.

It's like plugging in a number for x, but instead you are plugging in a whole function instead of just a number. Whenever you are pluging something in, whatever it is, make sure it is in parentheses: ( ) always!

Until your understanding of algebra becomes stronger.

2f(x)-hx

First lets plug in x + 2 for f(x). It's gonna look like this:

2(x + 2) - h(x)

Notice how I put x + 2 in parentheses next to the 2, you

a l w a y s want to do this. Now we just do the same for h(x):

2(x + 2) - (1/x - 1)

And that's it. That's all you have to do.