Multiple Choice Question (MCQ)

x^2 + 2x + 3 = 0 has

  1. ×

    two real rational roots

  2. ×

    two real irrational roots

  3. ×

    two equal real roots

  4. ×

    two equal rational roots

  5. two complex conjugate roots

Collected in the board: Quadratic function

Steven Zheng posted 2 weeks ago


Answer

  1. Since the discriminant of the quadratic equation

    b^2-4ac = 2^2-4\cdotp 1\cdotp 3 =-8<0,

    the roots of the quadratic equation will be two complex conjugate roots

Steven Zheng posted 2 weeks ago

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