SOLUTION: using foil method find the product (-c-d)2 i got -c2+cd-d2 is that correct?

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Question 34155: using foil method find the product (-c-d)2
i got -c2+cd-d2 is that correct?
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
+%28-c-d%29%5E2+
+%28-c-d%29%28-c-d%29+ which means, when you multiply it out:

(-c)(-c) + (-c)(-d) + (-d)(-c) + (-d)(-d)
+%28c%5E2%29+%2B+%28cd%29+%2B+%28cd%29+%2B+%28d%5E2%29+

note that all the negative signs are converted to positives since we have (negative) multiplied by (negative).

+c%5E2+%2B+2cd+%2B+d%5E2+

jon.