21a^(3)-17a^(2),89a^(3)-64a^(2)+6a+16 से...

`21a^(3)-17a^(2),89a^(3)-64a^(2)+6a+16` से कितना कम है ?

A

`68a^(3)-47a^(2)+6a+16`

B

`68a^(3)-47a^(2)-6a+16`

C

`68a^(3)+47a^(2)-6a+16`

D

`68a^(3)-47a^(2)+6a-16`

लिखित उत्तर

Verified by Experts

The correct Answer is:

A

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