WAEC Mathematics 2001 Question 15

Question 15

Algebraic Expressions

Factorize 6x2 + 7x − 20

  1. A.(6x − 5)(x + 4)
  2. B.2(3x − 5)(x + 2)
  3. C.(3x + 4)(2x − 5)
  4. D.(3x − 4)(2x + 5)
Show the answer and explanation

Answer: D ((3x − 4)(2x + 5))

Explanation

(3x − 4)(2x + 5) = 6x2 + 15x − 8x − 20 = 6x2 + 7x − 20.