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OpenStudy (anonymous):
(x+1)(x-1)(x+2)(x-2) I got x^4-5x^2+4, is this correct?
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OpenStudy (anonymous):
looks good to me!
OpenStudy (anonymous):
http://www.wolframalpha.com/input/?i=(x%2B1)(x-1)(x%2B2)(x-2) Wolframalpha lists that as an alternate form, so it is correct.
OpenStudy (anonymous):
Thanks!
OpenStudy (anonymous):
@wio thanks for that site
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