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Mathematics 21 Online
OpenStudy (xmoses1):

I need help with this trinomial

OpenStudy (xmoses1):

(a + b - c)(a + b + c)

OpenStudy (kc_kennylau):

group a+b as a group, you're left with the "difference of square" identity :D

OpenStudy (anonymous):

|dw:1387681169143:dw|

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