SOLUTION: Use the "difference of squares" rules to factor the following expression: 16x^4-121y^ Please help...Thanks in advance..

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Question 631693: Use the "difference of squares" rules to factor the following expression:
16x^4-121y^

Please help...Thanks in advance..
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Use the "difference of squares" rules to factor the following expression:
16x^4-121y^
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What is the 2nd exponent?