If a=8+3 root seven,b=1/a,find the value of a2+b2
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a=8+3√7
b=1/a
=>b=1/a
=1/8+3√7
by rationalizing the dinominator
we bet the value of b =8-3√7
then the value of
a2+b2=[8+3√7]2+[8-3√7]2
=64+63+48√7+64+63-48√7
=254
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