Question

4. What is the common denominator of

Answer 1

Its the last option:

4(x + 6)(x - 2)

Explanation:

x^2 + 4x - 12 = (x - 2)(x + 6)

4x - 8= 4(x - 2)

Now x - 2 is common to both factors, so:

Common Denominator = 4(x - 2)(x + 6)

or 4(x + 6)(x - 2).

(The order of the last 2 factors does not matter - the 2 expressions mean same thing.