a=3+2√2 find a^2+1/a^2 help me solving this question
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A=3+2ROOT2
A^2+1/A^2
(3+2ROOT2)^2 + 1/(3+2ROOT2)
(9+4*2) + 1/(9+4*2)
17+1/17
17*17+1/17
290/17
=17.05
A^2+1/A^2
(3+2ROOT2)^2 + 1/(3+2ROOT2)
(9+4*2) + 1/(9+4*2)
17+1/17
17*17+1/17
290/17
=17.05
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