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Values from known sum and difference

Values from known sum and difference

Secondary 2
7 marks
TGM Original Questions

Core stretch

Given \(a+b=-5\) and \(a-b=11\), find

  1. \(a^2-2ab+b^2\),[2]
  2. \(7a^2-7b^2\), and[2]
  3. \(a^2+b^2\).[3]

Solution:

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Answer:(a) \(121\) (b) \(-385\) (c) \(73\).

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