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Mathematics 7 Online
OpenStudy (anonymous):

What is the product of these polynomials? (3x2 - 2x)(2x2 + 3x - 1) A. 6x4 + 5x3 - 9x2 + 2x B. 5x4 + 2x3 - 8x2 + 2x C. 6x4 + 5x3 - 3x2 + 2x D. 6x4 + 5x3 - 9x2 - 2x

Parth (parthkohli):

= 3x2(2x2 + 3x - 1) - 2x(2x2 + 3x - 1) = 6x4 + 9x3 - 3x2 - 4x3 - 6x2 + 2x = 6x4 + 5x3 - 9x2 + 2x

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