15а^2/(3a-2) – 5a=15а^2/(3a-2)– 5a(3a-2)/(3a-2)=(15а^2– 5a(3a-2))/(3a-2)=(15а^2-15а^2+10a)/(3a-2)=10a/(3a-2)
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15а^2/(3a-2) – 5a=15а^2/(3a-2)– 5a(3a-2)/(3a-2)=(15а^2– 5a(3a-2))/(3a-2)=
(15а^2-15а^2+10a)/(3a-2)=10a/(3a-2)