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OpenStudy (anonymous):
Ok, I need help figuring out, (-7 + sqrt-5) ^2. I know it's re-written as (-7 + sqrt -5) (-7 + sqrt -5). Do I use FOIL to figure this out?
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OpenStudy (kinggeorge):
FOIL would be an excellent strategy in this case.
OpenStudy (anonymous):
Yes, but rewrite it. sqrt -5 means imaginary..
OpenStudy (anonymous):
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