putty
a2 + b2 = 5ab find the value of a3/b3 + b3/a3



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Jonask
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use \[(x^3+y^3)=(x+y)(x^2xy+y^2)\]

Jonask
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a/b=x
b/a=y
a/b+b/a=5

Jonask
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x+y=5