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Factorize completely: 6ax - 12by - 9ay + 8bx

Mathematics
WAEC 2015
Factorize completely: 6ax - 12by - 9ay + 8bx
  • A. (2a - 3b)(4x + 3y)
  • B. (3a + 4b)(2x - 3y)
  • C. (3a - 4b)(2x + 3y)
  • D. (2a + 3b)(4x -3y)
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Correct Answer: Option B
Explanation
6ax - 12by - 9ay + 8bx

= 6ax - 9ay + 8bx - 12by

= 3a(2x - 3y) + 4b(2x - 3y)

= (3a + 4b)(2x - 3y)
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