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GCE Mathematics 1989 Question 11

Question 11

Algebraic Expressions

Factorize the following expression; 2x2 + x − 15

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

Answer: B ((2x − 5)(x + 3))

Explanation

(2x − 5)(x + 3) = 2x2 + 6x − 5x − 15 = 2x2 + x − 15.