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OpenStudy (anonymous):
Simplify this expression. 3x^2(7x^2 - 9) Select one of the options below as your answer: A. 21x^2 - 9 B. 21x^2 - 27x^2 C. 21x^4 - 9 D. 21x^4 - 27x^2
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OpenStudy (anonymous):
D
OpenStudy (anonymous):
yep
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