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Find the coefficient of m in the expression of (\(\frac{m}{2} - 1 \frac{1}{2}\)) (m +...

Mathematics
WAEC 2012

Find the coefficient of m in the expression of (\(\frac{m}{2} - 1 \frac{1}{2}\)) (m + \(\frac{2}{3}\))
  • A. -\(\frac{1}{6}\)
  • B. - \(\frac{1}{2}\)
  • C. -1
  • D. -1\(\frac{1}{6}\)
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Correct Answer: Option D
Explanation
(\(\frac{m}{2} - 1\frac{1}{4}\))(m + \(\frac{2}{3}\))

(\(\frac{m}{2} - \frac{3}{2}\))(\(\frac{m}{1} + \frac{2}{3}\))

= \(\frac{m^2}{3} + \frac{3m}{6} - \frac{6}{6}\)

= \(\frac{2m - 9m}{6}\)

= \(\frac{-7m}{6}\)

= 1\(\frac{1}{6}\)

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts