posted by heather .
Factor each expression by grouping. Can you please show me the steps on how you get your answer so I know how to do the problem thank you.
For grouping you usually have an even number of terms.
look at pairs of terms and see if the same common factor is found in "pairs"
=9p^2 + p^2n^2 + mn^2 + 9m
= p^2(9 + n^2) + m(n^2 + 9)
= (n^2 + 9)(p^2 + m)