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What factor is common to all the expressions x2 - x, 2x2 + x -...

Mathematics
JAMB 1980
What factor is common to all the expressions x2 - x, 2x2 + x - 1 and x2 - 1?
  • A. x
  • B. x + 1
  • C. x - 1
  • D. No common factor
  • E. (2x - 1)
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Correct Answer: Option D
Explanation
x2 - x = x(x - 1)

= 2x2 + x - 1

= (2x - 1)(x + 10

x2 - 1 = (x + 1)(x - 1)

No factor
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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