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Mathematics 21 Online
OpenStudy (anonymous):

Multiply and simplify: 10x(9x^2 + 6x + 7) A. 9x^2 + 16x + 7 B. 90x^3 + 130x C. 90x^3 + 60x^2 + 70x D. 90x^2 + 60x + 70

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