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OpenStudy (anonymous):
Simplify (2 + squareroot5)(2 - squareroot5)
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OpenStudy (anonymous):
Hint: (a+b)(a-b)=a^2 - b^2
OpenStudy (anonymous):
Does it help?
OpenStudy (anonymous):
2^2 - 5?
OpenStudy (anonymous):
yes
OpenStudy (anonymous):
Thanks so much! I wasn't even thinking this ><
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OpenStudy (anonymous):
Welcome
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