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WAEC Further Mathematics 2008 Question 38

Question 38

Polynomials

If y = x2 − 6x + 11 is written in the form y = a(x − h)2 + k, find the value of (a + h + k)

  1. A.−4
  2. B.−3
  3. C.0
  4. D.6
Show the answer and explanation

Answer: D (6)

Explanation

Completing the square: y = (x − 3)2 + 2, so a = 1, h = 3, k = 2 and a + h + k = 6.