( 15 ) ^ { 3 } - ( 9 ) ^ { 3 } - ( 6 ) ^ { 3 } – InterviewSolution

1.

( 15 ) ^ { 3 } - ( 9 ) ^ { 3 } - ( 6 ) ^ { 3 }

Answer»

we know when a+b+c =0a³+b³+c³ = 3abcsohere we have 15+ (-9) + (-6) = 0

so 15³ -9³ -6³ = 3 × 15×(-9)×(-6)= 2430

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