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WAEC Mathematics 2009 Question 14

Question 14

Algebraic Expressions

Factorize x2 − 2x − 3xy + 6y completely.

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

Answer: B ((x − 3y)(x − 2))

Explanation

Group: x(x − 2) − 3y(x − 2) = (x − 2)(x − 3y).