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Q13.Using a suitable identity to evaluate (55) 3 - (25) 3 -(30) 3 |
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Answer» Therefore, 55³+(-25)³+(-30)³ = 123750Step-by-step Explanation : If a+b+C = 0, then a³+b³+c³-3ABC = 0 Let a = 55, b = -25, c = 30 a + b + c = 55 + (-25) + (-30) = 55 - 25 - 30 = 0 Thus, a + b + c = 0 HENCE, a³ + b³ + c³ - 3abc = 0 a³ + b³ + c³ = 3abc 55³ + (-25)³ + (-30)³ = 3 × 55 × (-25) × (-30) = 123750 Therefore, 55³+(-25)³+(-30)³ = 123750 _________________ ✌ ✌ ✌ ✪ Be Brainly ✪ |
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