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    Mathematics
    Grade10
    Easy

    Question

    What is the discriminant of x to the power of 2 end exponent minus 2 x plus 5 equals 0.

    1. 0    
    2. -16    
    3. -23    
    4. 31    

    hintHint:

    Any equation of the form p (x) = 0, where p (x) is a polynomial of degree 2, is a quadratic equation

    The correct answer is: -16

      Step 1 of 1:
      We have given an equation x to the power of 2 end exponent minus 2 x plus 5 equals 0.
      b to the power of 2 end exponent minus 4 a c equals open parentheses negative 2 close parentheses to the power of 2 end exponent minus 4 blank cross times blank 1 blank cross times blank 5
      equals 4 minus 20
      equals negative 16 less than 0, so, it has no real solution

      The discriminant is the part of the quadratic formula found within the square root.

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