WAEC Further Mathematics 2020 Question 8

Question 8

Polynomials

If (6x + k)/(2x2 + 7x − 15) ≡ 4/(x + 5) − 2/(2x − 3) find the value of k.

  1. A.−21
  2. B.−22
  3. C.−24
  4. D.−25
Show the answer and explanation

Answer: B (−22)

Explanation

6x + k = 4(2x − 3) − 2(x + 5) = 6x − 22, so k = −22.