Perfect square recognition and scaling

Perfect square recognition and scaling

Secondary 2

4 marks

TGM Original Questions

Given \((a-b)^2=28\), find exactly \((\frac23b-\frac23a)^2\).[4]

Solution:

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Answer:\(=\dfrac49(a-b)^2=\dfrac49(28)=\dfrac{112}9\)

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