Question

Find the least common denominators for these two rational expressions 1/a 8/8a^2

Answer 1

Next time, please separate the expressions with a comma, semicolon or the word "and."

I need to assume that you meant "8/(8a^2)" If that's the case, then what you have here is

1 8
--- and -----------
a 8a^2

I would then cancel the 8s, obtaining:

1 1
--- and -----------
a a^2
a
and then multiply 1/a by (a/a): -----------
a^2

to obtain

a 1
------- and -------
a^2 a^2

There is only one LCD here, and it's "a^2."