4. k^2 – 81h^2 (1 point)
(k – 9h^2)(k + 9)
(k + 9h)(k + 9h)
h2(k + 9)(k – 9)
(k + 9h)(k – 9h)

Question

4.   k^2 – 81h^2   (1 point)
(k – 9h^2)(k + 9)
(k + 9h)(k + 9h)
h2(k + 9)(k – 9)
(k + 9h)(k – 9h)

anonymous · Answer

I know the answer. Talk me through what you are thinking. The first thing I see is that there is no middle term like a typical polynomial. So it must have cancelled out. This can only happen if the factorization is in the form (a + b)(a - b)

anonymous · Answer

So right away we know b is incorrect. Your thoughts on what you see next

anonymous · Answer

C can't be right because it is saying that k^2 is factored out of both terms, but it isn't in both terms

anonymous · Answer

I think it is D. am not sure though?

anonymous · Answer

You are correct. Let me ask you this last question. Why is the answer not A?

anonymous · Answer

"C can't be right because it is saying that k^2 is factored out of both terms, but it isn't in both terms" I meant h^2 with this post