Question 478481
(t -1)^2/(t +5)^2 * (t +5)/(t-1) 
Multiply and simplify to lowest terms, leave answers in factored form
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= (t-1)/(t+5)
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Second problem
a^2/a + b + 2ab +b^2 /a +b Simplify to lowest terms
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Assuming the denominator is (a+b) you get:
(a^2+b^2)/(a+b) + 2ab
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Cheers,
Stan H.