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Factorize 1 - (a - b)2

Mathematics
JAMB 1991
Factorize 1 - (a - b)2
  • A. (1 - a - b)(1 - a + b)
  • B. (1 + a - b)(1 - a + b)
  • C. (1 - a + b)(1 - a + b)
  • D. (1 + a + b)(1 + a + b)
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Correct Answer: Option B
Explanation
1 - (a - b)2 = [1 + (a - b)][1 - a + b]

= (1 + a - b)(1 - a + b)
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