what is the lcd of k+2 k^2-4 and how do u do it?

Answer 1

To find an LCD of expressions, factor each as completely as possible.
k + 2 = (k + 2^1 (k - 2)^0
k^2 - 4 = (k + 2)^1 (k - 2)^1.

Now, for the LCD, take each of the above factors, each with the highest exponent which occurs in the above array. Thus,
LCD = (k + 2)^1 (k + 2)^1 = = k^2 - 4.