Symmetric reciprocal relations

Symmetric reciprocal relations

Secondary 2
4 marks
TGM Original Questions

Core stretch

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

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

Solution:

Solution locked

Sign in to view the step-by-step solution

Please join our E Math programme to search for similar questions for more practice.

E Math Tuition
Answer:(i) \(ab=\dfrac75\) (ii) \(\dfrac{28}{5}\).

Need help? Join our JC Math tuition classes.

Learn more