Ratio from a symmetric condition

Ratio from a symmetric condition

Secondary 2
TGM Original Questions

Given \(a^2+b^2=4ab\):

  1. expand and simplify \((a-b)^2\)
  2. if \(\frac{a+b}{a-b}=k\) and \(k>0\), find \(k\).

Solution:

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Answer:(a) \(2ab\); (b) \(k=\sqrt3\).

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