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Mathematics 18 Online
OpenStudy (anonymous):

Please help me multiply this rational expression

OpenStudy (anonymous):

jimthompson5910 (jim_thompson5910):

what do you get when you factor s^2 - 81 ?

OpenStudy (anonymous):

(s-9)(s+9)?

jimthompson5910 (jim_thompson5910):

yes

jimthompson5910 (jim_thompson5910):

so a "s+9" up top cancels with a "s+9" in the bottom

jimthompson5910 (jim_thompson5910):

what else cancels?

jimthompson5910 (jim_thompson5910):

|dw:1414552213581:dw|

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