(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

1.) (a + 3b) /3ab + (a^2 b - 4ab^2) / 5a^2b^2

2.) n/(m^2) + 3/mn + 2/m

3.) Given F(x) = square root of x + 9 determine F(x+h) - F(x)/h

4.) say whether or not {(x,y) l x= y^2} is a function.

2. Relevant equations

3. The attempt at a solution

im having problems to find the least common multiple of the algebric expresions in the first two problems.

I think that on problem one the LCM is 15 a^2 b^2

I think that on the second problem the LCM is m^2 (mn) Is this right?

On problem 3 I dont know how to solve (square root of(x+h) +9 - square root of x+9)/ h

How can I solve that? should I use the square root's conjugate? and if so which is it?

Thanks a lot.

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# Homework Help: Adding fractions and evaluating functions

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