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    (Original post by RDKGames)
    Discriminant being less 0 doesn't denote whether a quadratic is strictly positive or negative. It simply says that it doesn't cross the x-axis.
    Does the shape of the graph determine whether the expression is less than zero?
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    (Original post by FHL123)
    Does the shape of the graph determine whether the expression is less than zero?
    Yes. The leading coefficient is negative for 2x-2-2x^2\equiv -2x^2+2x-2 so the parabola will be in the shape of \cap
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    (Original post by RDKGames)
    Yes. The leading coefficient is negative for 2x-2-2x^2\equiv -2x^2+2x-2 so the parabola will be in the shape of \cap
    I appriciate you help☺️Especially because I'm self teaching further Maths!
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    (Original post by FHL123)
    I appriciate you help☺️Especially because I'm self teaching further Maths!
    You're welcome. If you run into any more tricky questions feel free to post them on the Maths forum rather than the A-Level one as then your questions would be answered quicker and more reliably.

    https://www.thestudentroom.co.uk/forumdisplay.php?f=38
 
 
 
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