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17 January, 12:05

For what values of m does the graph of y=3x^2+7+m have two x-intercepts?

A. M>25/3

B. M<25/3

C. M<49/12

D. M>49/12

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Answers (1)
  1. 17 January, 12:25
    0
    I guess you have a typo.

    The equation should be y=3x^2+7x+m

    When it has two x-intercepts,

    [ (7) ^2]-4 (3m) >0,

    i. e. m<49/12

    Hence, the answer is C
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