Symmetric reciprocal relations

Symmetric reciprocal relations

Secondary 2
TGM Original Questions

Given \((a+b)^2=7\) and \(\frac ab+\frac ba=3\), find

  1. \(ab\), and
  2. \((2b-2a)^2\).

Solution:

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Answer:(i) \(ab=\frac75\); (ii) \(\frac{28}{5}\).

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