Question

Find the least common denominator of the two rational expressions:

http://static.k12.com/bank_packages/files/media/mathml_a902ed891e4e997879489f4179b4bbb5974669de_1.gif


A.
The LCD is k – 2.

B.
The LCD is k + 2.

C.
The LCD is k^2 – 4.

D.
The LCD is 2 – k.

Answer 1

@perl ?

Answer 2

the lcd is (k-2)(k+2) or k^2 - 4

Answer 3

So that rules out D, correct?

Answer 4

I think the answer is B. What do you think @perl ?

Answer 5

@Mr.Expensive , what do you think?

Answer 6

C