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Mathematics 13 Online
OpenStudy (anonymous):

4x^2-81y^2

OpenStudy (saifoo.khan):

HINT: Differences of squares. (a-b)(a+b) = a^2 - b^2

OpenStudy (anonymous):

st and stay saif

OpenStudy (anonymous):

* sit and stay

OpenStudy (anonymous):

sit and stay safe ?

OpenStudy (saifoo.khan):

lol, she was referring to me. my name is saif.

OpenStudy (anonymous):

ooo

OpenStudy (anonymous):

lol i was tellin saif to stay

OpenStudy (anonymous):

yay u figured out my pic!!

OpenStudy (saifoo.khan):

lol. ;)

OpenStudy (anonymous):

wierd i did not know it was abe

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