Question 203818
( 10t-10t^3) / (5t-5t^2)
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{(10t)(1-t^2)} / {(5t)(1-t)}
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{(10t)(1-t)(1+t)} / { (5t)(1-t)}
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simplify  by  cancelling  like  terms
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2(1+t)
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check,,,Let  t=2,,,both  original  and  answer  = 6,,,,,ok