passwella.
Menu

JAMB Mathematics 1982 Question 36

Question 36

Quadratic Equations

The solution to the quadratic equation 5 + 3x − 2x2 = 0 is

  1. A.(5/2, 1)
  2. B.(5, 3)
  3. C.(−5/2, 1)
  4. D.(−5/2, −1)
  5. E.(5/2, −1).
Show the answer and explanation

Answer: E ((5/2, −1).)

Explanation

5 + 3x − 2x² = (5 − 2x)(1 + x) = 0, so x = 5/2 or −1.