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`(1-x)(1+x^2)(1+x)(1+x^2)` equals:a.1-x^6b.1+x^6c.1-x^8d.1+x^8e. None of the above
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High School Teacher
None of the original answer choices is correct, so I added a choice e. We can rearrange and then use the difference of squares formula twice.
This is the second multiple choice question you've posted recently where all the answer choices are wrong. If you're getting them from a book, I suggest finding a new book :)
Posted by degeneratecircle on March 6, 2013 at 9:38 PM (Answer #1)
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