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31 May, 19:33

F (x) = - 3x+5x^2+8 has blank roots.

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  1. 31 May, 22:54
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    F (x) = - 3x+5x^2+8 has complex roots.

    Step-by-step explanation:

    number of roots?

    ok.

    f (x) = 5xx - 3x + 8 = 5xx + 5x - 8x + 8 (I was guessing what numbers would sum to - 3)

    nope.

    ok try discriminant: (-3) ^2 - 4*5 * 8 = 9 - 160 < 0

    2 complex roots
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