plzzz solve my question
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a+1/a=5
on cube both side
a ³+1/a³+3×a²×1/a+3×a×1/a²=125
a³+1/a³+3a+3/a=125
a³+1/a³+3(a+1/a)=125
a³+1/a³+3×5=125
a³+1/a³=125-15
a³+1/a³=110
on cube both side
a ³+1/a³+3×a²×1/a+3×a×1/a²=125
a³+1/a³+3a+3/a=125
a³+1/a³+3(a+1/a)=125
a³+1/a³+3×5=125
a³+1/a³=125-15
a³+1/a³=110
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