Math, asked by krishas28, 1 year ago

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Answered by kushi30

0

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Answered by Anonymous

0

Answer:

Step-by-step explanation:

a+b = 9

ab=20

:. BtQ,

(a+b)³=9³

a³+b³+3ab(a+b)=729

a³+b³+3*20(9)=729

a³+b³=729-540

a³+b³= 189

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