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20 July, 09:22

Find the zeros of f (x) = 9x2 - 27x + 20

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  1. 20 July, 11:20
    0
    Factor

    f (x) = (3x-5) (3x-4)

    set to zero

    3x-5=0

    3x=5

    x=5/3

    3x-4=0

    3x=4

    x=4/3

    x=4/3 and 5/3

    zeroes are at (4/3,0) and (5/3,0)
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