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3a^7-b-81a^4b^4...

`3a^7-b-81a^4b^4`

Text Solution

Verified by Experts

The correct Answer is:
`3a^5b(a-3b)(a^2+3ab+9b^2)`
`3a^7b-81a^4b^4=3a^4b(a^3-27b^3)`.
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