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Cube roots of 8 are +2 and –2. - Mathematics

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Question

Cube roots of 8 are +2 and –2.

Options

  • True

  • False

MCQ
True or False

Solution

This statement is False.

Explanation:

(2)3 = 2 × 2 × 2 = 8

∴ `root(3)(8) = 2`

But (–2)3 = (–2) × (–2) × (–2) = –8 ≠ 8

∴ `root(3)(8) ≠ -2`

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Chapter 3: Square-Square Root and Cube-Cube Root - Exercise [Page 93]

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NCERT Exemplar Mathematics [English] Class 8
Chapter 3 Square-Square Root and Cube-Cube Root
Exercise | Q 83. | Page 93

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