If a+b = 8 and ab = 15. then a³+b³ is

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A224

B244

C152

D128

Answer:

a+b=8 and, ab = 15 (a+b)³ = a³ +b³ +3ab(a+b) a³+b³=(a+b)³ –3ab(a+b) = 8³-3x15x8 =512-360 =152

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