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OpenStudy (anonymous):
What are the factors of x2 − 81? (x + 9)(x − 9) (x − 9)(x − 9) (x + 3)(x − 27) Prime Stuck between (x + 9)(x − 9) and (x + 3)(x − 27)
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OpenStudy (ivettef365):
If you do the multiplication you will find that it can not be (x+3)(x-27) that would be equal to x^2 -27x +3x - 81 which is = x^2 -24x - 81 and you are looking for x^2 - 81
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