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JAMB Mathematics 2014 Question 13

Question 13

Algebraic Expressions

Factorise 2y2 − 15xy + 18x2.

  1. A.(3y + 2x)(y − 6x)
  2. B.(2y − 3x)(y + 6x)
  3. C.(2y − 3x)(y − 6x)
  4. D.(2y + 3x)(y − 6x)
Show the answer and explanation

Answer: C ((2y − 3x)(y − 6x))

Explanation

(2y − 3x)(y − 6x) = 2y2 − 12xy − 3xy + 18x2 = 2y2 − 15xy + 18x2.