SOLUTION: (3z^4 -8)^2 cannot figure out how to find the product of this equation

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Question 411450: (3z^4 -8)^2
cannot figure out how to find the product of this equation
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
9z^8-24z^4-24z^4+64
=9z^8-48z^4+64