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31 October, 21:51

For what values of m does the graph of y=mx^2-5x-2 have no x-intercepts

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  1. 1 November, 00:19
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    Consider this option:

    according the condition the graph mx²-5x-2 have no x-interception.

    It means that D<0:

    D=25+2*4*m=25+8m<0; ⇒ 8m+25<0; ⇔ m<-25/8; ⇔ m<-3.125.

    answer: m∈ (-oo; -3.125).
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