StonerGirl07 StonerGirl07

27-11-2016
Mathematics

Answered

Find the least common denominator for these two rational expressions.

y/y^2 -1 y/y^2 -8y+7

Verified Answer :

bartdrinksmalk bartdrinksmalk

27-11-2016

\(\frac{y}{y^{2}-1},\ \frac{y}{y^{2}-8y+7}\)
\(=\frac{y}{(y-1)(y+1)},\ \frac{y}{(y-1)(y-7)}\)
\(=\frac{y(y-7)}{(y-1)(y+1)(y-7)},\ \frac{y(y+1)}{(y-1)(y+1)(y-7)}\)

So the common denominator is \((y-1)(y+1)(y-7)\)

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