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OpenStudy (anonymous):
If x + y = 7/10 and x - y = 5/14 then what does x^2 -y^2 equal? A) (7/10)^2 - (5/14) ^2 B) (1/2)^2 C) (5/14)^2 D) (7/10 - 5/14) ^2
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OpenStudy (amistre64):
what is the product of conjugates?
OpenStudy (amistre64):
in other words: (a+b)(a-b) = ???
OpenStudy (anonymous):
ohhh i see thanks
OpenStudy (anonymous):
so b?
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