McGraw Hill Integrated II, 2012
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McGraw Hill Integrated II, 2012 View details
5. Using the Distributive Property
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Exercise 34 Page 40

Rewrite the given expression so that it is easier to make groups.

(r+9)(p-9)

Practice makes perfect

To factor by grouping, we will take the greatest common factor of the first pair of terms and the greatest common factor of the second pair of terms.

rp - 9r+9p-81
r(p-9) + 9p - 81
r(p-9)+9(p-9)

Notice that (p-9) is a factor of all three terms, so we can factor it out.

r(p-9)+9(p-9)
(p-9)(r+9)
(r+9)(p-9)