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JAMB Mathematics 1986 Question 20

Question 20

Algebraic Expressions

Factorize x2 + 2a + ax + 2x

  1. A.(x + 2a)(x + 1)
  2. B.(x + 2a)(x − 1)
  3. C.(x2 − 1)(x − a)
  4. D.(x + 2)(x + a).
Show the answer and explanation

Answer: D ((x + 2)(x + a).)

Explanation

Group the terms: x(x + 2) + a(x + 2) = (x + 2)(x + a).