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23-07-2016
Mathematics

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

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konrad509 konrad509

23-07-2016

[tex]\Delta\ \textless \ 0\\ \Delta=(-5)^2-4\cdot m\cdot(-2)=25+8m\\ 25+8m\ \textless \ 0\\ 8m\ \textless \ -25\\ m\ \textless \ -\dfrac{25}{8}[/tex]

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