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OpenStudy (anonymous):
Factorise: a^2 - b^2 + a - b
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OpenStudy (anonymous):
Use difference of squares.
OpenStudy (anonymous):
\[ a^2-b^2=(a+b)(a-b) \]
OpenStudy (anonymous):
The answer is (a-b) (a+b+1)
OpenStudy (anonymous):
I never said it wasn't.
OpenStudy (anonymous):
ik urs is also correct
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OpenStudy (anonymous):
I gave you a step to do the whole thing
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