if a³=81 and b³ =72, find the value of ab.
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a=³√81
a= 3(³√3)
b=³√72
b=2(³√9)
a×b=3(2)(³√3) (³√9)
ab=6( ³√27)
ab=6(3)
ab=18
Answered by
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a³=> 81 b³ => 72
a => √81 b => √72
a=> 9 b=> 6√2
value of a×b => 9×6√2 => 76.3675
Hope it helps
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