Rational targets from sums and differences

Rational targets from sums and differences

Secondary 2

4 marks

TGM Original Questions

Given \(a+b=35\) and \(a-b=33\), find \(\frac{a^2-b^2}{5}\).[4]

Solution:

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Answer:\(\dfrac{a^2-b^2}5=\dfrac{(a+b)(a-b)}5=\dfrac{35(33)}5=231\)

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