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Black Advanced Problems in Mathematics
Exam
Black Advanced Problems in Mathematics
Subject
Mathematics
Chapter
Quadratic Equation

Black Advanced Problems in Mathematics · Mathematics · Quadratic Equation

For what least integral 'k' is the quadratic trinomial (k - 2)x^2 +...

For what least integral 'k' is the quadratic trinomial (k−2)x2+8x+(k+4)(k - 2)x^2 + 8x + (k + 4) is positive for all real values of x ?

Options

  1. Ak=4k = 4
  2. Bk=5k = 5
  3. Ck=3k = 3
  4. Dk=6k = 6.

Correct answer

B. k=5k = 5

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