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Mathematics 20 Online
OpenStudy (anonymous):

i need help

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

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OpenStudy (anonymous):

Hint: Cross multiply.

OpenStudy (anonymous):

x^2 - a^2 = (x-a)*(x+a) x^2 - 1 = x^2 - 1^2 = ?

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