if a=9+4root5,b=1/a,find a^2+b^2 and a^3+b^3
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given us , a=9+4√5
so,a²=9²+16.5+18.4√5
=81+80+72√5
=161+72√5
a³=(161+72√5)(9+4√5)
=..............
same type you do and put the equation ...then you find the ans ,ok ...my dear
so,a²=9²+16.5+18.4√5
=81+80+72√5
=161+72√5
a³=(161+72√5)(9+4√5)
=..............
same type you do and put the equation ...then you find the ans ,ok ...my dear
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