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Cube Numbers

Find the valu...

Question

Find the value of the following:
(i) $15^{3}$ (ii) $(- 4)^{3}$ (iii) $(1.2)^{3}$ (iv) ${(\frac{- 3}{4})}^{3}$

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Solution

(i) $15^{3} = 15 \times 15 \times 15 = 3375$
(ii) $(- 4)^{3} = (- 4) \times (- 4) \times (- 4) = - 64$
(iii) $(1.2)^{3} = 1.2 \times 1.2 \times 1.2 = 1.728$
(iv) ${(\frac{- 3}{4})}^{3} = \frac{(- 3) \times (- 3) \times (- 3)}{4 \times 4 \times 4} = \frac{- 27}{64}$
Observe the question (ii) Here $(- 4)^{3} = - 64$ .

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