if a+b=9 and ab=7 find a3+b3
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Answered by
33
Answer:
(a+b)³=a³+b³+3(a+b)ab
9³=a³+b³+3(9)(7)
729=a³+b³+189
a³+b³=729-189
a³+b³=540
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Answered by
1
Answer:
Answer:(a+b)³=a³+b³+3(a+b)ab
Answer:(a+b)³=a³+b³+3(a+b)ab9³=a³+b³+3(9)(7)
Answer:(a+b)³=a³+b³+3(a+b)ab9³=a³+b³+3(9)(7)729=a³+b³+189
Answer:(a+b)³=a³+b³+3(a+b)ab9³=a³+b³+3(9)(7)729=a³+b³+189a³+b³=729-189
Answer:(a+b)³=a³+b³+3(a+b)ab9³=a³+b³+3(9)(7)729=a³+b³+189a³+b³=729-189a³+b³=540
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