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OpenStudy (anonymous):
Simplfyy : (7x + 1) (7x - 1) i got 49x2^-1 .
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OpenStudy (anonymous):
yup
OpenStudy (anonymous):
u are correct
OpenStudy (anonymous):
correct...!
OpenStudy (anonymous):
But the worksheet thingy said i was wrong.
OpenStudy (anonymous):
then worksheet is wrong, because you are correct :D
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OpenStudy (anonymous):
Yay ( =
jhonyy9 (jhonyy9):
yes there us formula a square - b square =(a-b)(a+b)
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