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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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nasirjam | Student, Grade 9 | (Level 2) Honors

Posted March 6, 2013 at 9:12 PM via web

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`(1-x)(1+x^2)(1+x)(1+x^2)` equals:





e. None of the above

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degeneratecircle | High School Teacher | (Level 2) Associate Educator

Posted March 6, 2013 at 9:38 PM (Answer #1)

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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 :)


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atyourservice | Student, Grade 11 | TA | (Level 3) Valedictorian

Posted February 23, 2014 at 4:46 AM (Answer #2)

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based on the calculations on my paper it is e

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