Question

Find the cube root of the following:
i)-216 x 1728
ii) -125 v -3375

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Answer 1

I)

$\sqrt[3]{ - 216 \times 1728} \\ \sqrt[3]{ {6}^{3} \times {12}^{3} } \\ = - 12 \times 6 = - 72$
ii)
$\sqrt[3]{ - 125 \times - 3375} \\ \sqrt[3]{ - 5 \times - 15} \\ - 5 \times - 15 \\ = 75$

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