Scaled products and half-sums

Scaled products and half-sums

Secondary 2
TGM Original Questions
  1. Given \(a^2+b^2=30\) and \((a-b)^2=50\), find \(\frac{2ab}{5}\).
  2. Given \(m-n=6\) and \(m^2-n^2=42\), find \((\frac{m+n}{2})^2\).

Solution:

Solution locked

Sign in to view the step-by-step solution

Similar questions are unavailable for this question.
Answer:(a) \(-4\); (b) \(\frac{49}{4}\).

Need help? Join our JC Math tuition classes.

Learn more