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28 March, 15:20

Algebraically determine the values of h and k to correctly complete the identity stated below 3x^3-6x^2+4x-2 = (x-2) (3x^2+hx+4) + k

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  1. 28 March, 15:26
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    We want to find h and k so that

    3x³ - 6x² + 4x - 2 ≡ (x-2) (3x² + hx + 4) + k

    Expand the right side.

    (x-2) (3x² + hx + 4) + k

    = 3x³ + hx² + 4x - 6x² - 2hx - 8 + k

    = 3x³ + (h-6) x² + (4 - 2h) x + k - 8

    Match coefficients of x²:

    h - 6 = - 6

    h = 0

    Match coefficients of x:

    4 - 2h = 4 (Correct because h=0)

    Match constants.

    k - 8 = - 2

    k = 6

    Answer: h=0, k=6
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