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Simplify this expression?

+1 vote
(a / (a - 1)) - (3 /( a^2 - 1))
asked Dec 28, 2012 in PRE-ALGEBRA by chrisgirl Apprentice

1 Answer

+3 votes

Given expression is (a / (a - 1)) - (3 /( a^2 - 1))

= (a / (a - 1)) - (3 /( a^2 - 1))

The LCM of a -1 and a^2 - 1 is a^2 - 1

= ( a (a + 1) - 3 (1) ) / a^2 - 1

= ( a^2 + a - 3 ) / a^2 - 1

answered Dec 28, 2012 by ashokavf Scholar

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