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OpenStudy (anonymous):
(q^(-2)-r^(-2))/q^(-1)-r^(-1))
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OpenStudy (anonymous):
(q^-1 +r^-1)(q^-1 -r^-1)/(q^-1/2 +r^-1/2)(q^-1/2 -r^-1/2) (q^1/2 +r^1/2)(q^1/2 -r^1/2)
OpenStudy (anonymous):
r+q/qr
OpenStudy (anonymous):
Its a difference of two squares issue,
OpenStudy (anonymous):
yea I have no Idea how to come up with the answer but I do know the answer is r+q/qr
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