SOLUTION: how do you factor 9-c^2d^2

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Question 442325: how do you factor 9-c^2d^2
Found 2 solutions by mananth, swincher4391:
Answer by mananth(16949) About Me  (Show Source):
You can put this solution on YOUR website!
9-c^2d^2
(3)^2=(cd)^2
(3+cd)(3-cd)

Answer by swincher4391(1107) About Me  (Show Source):
You can put this solution on YOUR website!
Recall, given some (a^2 -b^2), it always factors into (a+b)(a-b).
Well this is exactly what you have under your nose. (9-c^2d^2). Would it help if we simplified this to (9-(cd)^2)? Since (cd)^2 = c^2 d^2. Now it is apparent we have two perfect squares. So we can factor it in to %283%2Bcd%29%283-cd%29
Let me know if this is clear!
Hope this helped.