Question

a= 5+2✓6 b is the reciprocal of a find a*a + b*b

Answer 1

a=5+2√6
b=1/(5+2√6)
=5-2√6
a^2+b^2=(5+2√6)^2+(5-2√6)^2
25+24+20√6+25+24-20√6
98

Answer 2

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