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OpenStudy (anonymous):
Can somebody please explain, how my solutions manual got (a-b)(a-b+1) from (a-b)(a+b) +1(a+b), by grouping?
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OpenStudy (anonymous):
okay factor out (a+b) so you end up with: (a+b)[(a-b)+1]
OpenStudy (anonymous):
or if you open up parenthesis: (a+b)[a-b+1]
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