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Indices, SM-Bank 071

Show that  \(\sqrt{25\times 16}=\sqrt{25}\times \sqrt{16}\).  (2 marks)

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\(\text{LHS}:\sqrt{25\times 16}\) \(=\sqrt{ 5\times 5\times 4\times 4}\)
  \(=\sqrt{ 20\times 20}\)
  \(=20\)

 

\(\text{RHS}:\sqrt{25}\times \sqrt{16}\) \(=5\times 4\)
  \(=20\)

\(\therefore\ \text{LHS}\ =\ \text{RHS}\)

\(\therefore\ \sqrt{25\times 16}=\sqrt{25}\times \sqrt{16}\)

Filed Under: Indices Tagged With: num-title-ct-core, smc-4214-30-Roots

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