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Posted by on Sunday, September 12, 2010 at 5:12pm.

Find a value for k so that 2x^2 + kx + 1 has no real roots.

  • calculus - , Sunday, September 12, 2010 at 7:05pm

    When an expression has no real roots, the discriminant is less than zero.
    For example,
    3x²+kx+2=0
    has no real roots when
    k²-4*3*2<0
    or
    k<24

    Proceed along the same lines for the given equation.

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