Posted by **Shay** on Tuesday, July 26, 2011 at 4:04pm.

use the "difference of squares" rule to factor the following expression.

64z^4-81a^4

- algebra -
**PsyDAG**, Wednesday, July 27, 2011 at 11:00am
(8z^2+9a^2)(8z^2-9a^2)

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