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Difference of squares under a root
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Difference of squares under a root
Secondary 2
TGM Original Questions
Factorise \(p^2-q^2\).
Hence evaluate exactly \(\sqrt{8.6^2-1.4^2}\) without a calculator.
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Answer:
(a) \((p-q)(p+q)\); (b) \(6\sqrt2\).
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