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JAMB Mathematics 1988 Question 22

Question 22

Quadratic Equations

The solution of the quadratic equation px2 + qx + b = 0 is

  1. A.(−b ± √(b2 − 4ac))/2a
  2. B.(−b ± √(p2 − 4pb))/2a
  3. C.(−q ± √(q2 − 4bp))/2p
  4. D.(−q ± √(p2 − 4bp))/2p
Show the answer and explanation

Answer: C ((−q ± √(q2 − 4bp))/2p)

Explanation

In the formula x = (−B ± √(B² − 4AC))/2A, here A = p, B = q and C = b. So x = (−q ± √(q² − 4bp))/2p.