3. Find the value of the following:
(1)15³-14³
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3. Find the value of the following:
(1)15³-14³
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Answer: 29
Using the formula a³ - b³ = (a + b)(a - b) , we get -
15³ - 14³
⇒ (15 + 14)(15 - 14)
⇒ 29