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5 May, 18:05

Choose the correct simplification of 7x2 (6x + 3x2 - 4). 21x4 - 42x3 + 28x2 42x4 + 21x3 - 3x2 21x4 + 42x3 - 28x2 42x4 - 13x3 + 11x2

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  1. 5 May, 18:28
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    7x² (6x + 3x² - 4)

    7x² * 6x = 42x³

    7x² * 3x² = 21x⁴

    7x² * - 4 = - 28x²

    42x³ + 21x⁴ - 28x² is the correct answer.
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