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12 March, 18:06

Multiply (5x2 x - 4) (x 2). 5x3 x2 - 4x - 8 5x3 11x2 - 2x - 8 5x3 10x2 - 4x - 8 5x3 20x2 2x - 8

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  1. 12 March, 18:12
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    (5x^2 + x - 4) (x + 2) = x (5x^2 + x - 4) + 2 (5x^2 + x - 4) = 5x^3 + x^2 - 4x + 10x^2 + 2x - 8 = 5x^3 + 11x^2 - 2x - 8
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