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just factorise first fraction.
Factor your denominator and numerator. Hint: \[(a^2 -b^2)= (a+b)(a-b)\] (Denominator) Prod= 81 Sum = 18 So find two numbers that multiply to give 81 and add up to 19.

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Other answers:

\[x^2-81=(x+9)(x-9).\]
\[x^2+18x+81=(x+9)^2\]
now u can do it:)
gt it??
or not?
yeah i got it
good:)
^_^ thanx!
yw:)
No problem
that's easier to understand ^_^ appericate it
thanx:)
you're welcome!

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