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Posted by **Sabrina** on Wednesday, October 6, 2010 at 8:24pm.

9x8-745x4+1296

by

9x4-16??

Thankyou!!

- math -
**PsyDAG**, Thursday, October 7, 2010 at 1:49pmOnline "^" is used to indicate an exponent.

9x^8 - 745x^4 + 1296

Find factors for 1296 (2 * 2 * 2 * 2 * 9 * 9)

See how those can combine with factors of 9 from the first term to give the middle term.

9x^8 - 745x^4 + 1296 = (9x^4 - 16)(x^4 - 81)

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