Question 368803
 Multiply and simplify 
(9a^2)/(5a^2-30a+45)*(5a-15)/(3a)
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(9a^2)/(5(a^2-6a+9)*(5(a-3))/(3a)
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Cancel factors common to a numerator and a denominator,
such as 3a,5,(a-3), to get:
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= (3a)/(a-3)
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Cheers,
Stan H.