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(28)³+(-15)³+(-13)³,Without actual calculating the cubes, find the value of it. |
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Answer» HEYA......!!! ___________________________ We have to find the VALUE : => (28)³ + (–15)³ + (-13)³ Let -» a = 28 B -» -15 c -» -13 => a + b + c = 0 If -» a + b + c = 0. Then a³ + b³ + c³ = 3abc → 28)³+ (–15)³ + (-13)³ = 3(28)(-15)(-13) = 16380 → (28)³+ (–15)³ + (-13)³ = 16380 Answer = 16380 =============================== Hope It HELPS You. ☺ |
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