Mathematics
Grade10
Easy

Question

Find the discriminant of the quadratic equation 5 x squared minus 8 x plus 1 equals 0.

  1. 40
  2. 42
  3. 44
  4. 46

The correct answer is: 44


    for any quadratic equation ax2+bx+c=0 discriminant(D) is :-
    D=b2-4(a)(c)
    in the given equation 5 x squared minus 8 x plus 1 equals 0.
    a=5
    b=-8
    c=1
    D=(-8)2-4(5)(1)=64-20=44
    discriminant for given equation is 44

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