Factorize 62x + 1 + 7(6x) – 5

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Mathematics JAMB 1987

Factorize 62x + 1 + 7(6x) – 5

  • [3(6x) - 5][2(6x)m + 1]
  • [3(6x) + 5][2(6x) - 1] checkmark
  • [(6x) - 5][3(6x) + 1]
  • [2(6x) + 5][3(6x) - 1]

The correct answer is: B

Explanation

62x + 1 + 7(6x) - 5

Let 6x = y....(i)

6yx + 7y - 5 = 0

(3y + 5)(2y - 1) = 0.....(i)

Subt. for y from eqn. (i) in eqn. (ii)

= [3(6x) + 5][2(6x) - 1]
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