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WAEC Mathematics 2010 Question 45

Question 45

Quadratic Equations

If the sum of the roots of the equation (x − p)(2x + 1) = 0 is 1, find the value of p.

  1. A.1½
  2. B.½
  3. C.−½
  4. D.−1½
Show the answer and explanation

Answer: A (1½)

Explanation

The roots are x = p and x = −½. Their sum p − ½ = 1, so p = 1½.