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What is the simplest form of the distance \( \sqrt{108} \) in the square root spiral?

Answer and explanation

Correct answer: \(6\sqrt{3}\)

Since \(108=36\times3\), and \(36\) is the largest perfect-square factor of 108, \(\sqrt{108}=\sqrt{36}\times\sqrt{3}=6\sqrt{3}\). \(9\sqrt{2}\) is not correct because its square is \(81\times2=162\), not 108. Exam tip: first identify the largest perfect-square factor when simplifying a surd.

Related tags

Number SystemsSquare Root SpiralSurdsSimplifying RadicalsPerfect Square FactorsMathematicsClass 9 Mcq

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