SOLUTION: how would this be solved using foil. i dont undestand (c+4)(c-5)

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Question 589933: how would this be solved using foil. i dont undestand (c+4)(c-5)
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
(c+4)(c-5)
...
c(c) + c(-5) + 4(c) + 4(-5)
...
c%5E2+-+5c+%2B+4c+-+20
...
c%5E2+-+c+-+20
.....................
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