If a=8 +3root7 find the value of a square +1 upon a square
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1/a= 1/8+3√7
= 8-3√7/(8-3√7)(8+3√7)
= 8-3√7/64-63
= 8-3√7
a^2+ 1/a^2
(8+3√7)^2+ (8-3√7)^2
64+63+24√7+64+63-24√7
64+63+64+63
127+127
254
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