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(26. a+863 = (10)3 – 6x15x(10) saws (a+2b), ab e1. 152 . 103. 254.5 |
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Answer» Consider, a^3+ 8b^3= a^3+ (2b)^3 = (a + 2b)3− 3 × a × 2b(a + 2b) [Since, a^3+ b^3= (a + b)− 3ab(a + b)] = (a + 2b)^3− 6ab(a + 2b) = (10)^3− 6 × 15 × 10 = 1000 − 900 = 100hence comparing (a+2b)=10and ab =15 |
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