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22 July, 14:57

If s (x) = x - 7 and t (x) = 4x2 - x + 3, which expression is equivalent to (t*s) (x)

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  1. 22 July, 16:29
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    S (x) = x - 7; t (x) = 4x² - x + 3

    (t · s) (x) = (4x² - x + 3) (x - 7) = (4x²) (x) + (4x²) (-7) - (x) (x) - (x) (-7) + (3) (x) + (3) (-7)

    = 4x³ - 28x² - x² + 7x + 3x - 21 = 4x³ - 29x² + 10x - 21
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