Question

if a=5+2√(6) and b=1/a, then what will be the value of a^2 + b^2?

Answer 1

what is the value of 0-1+2-3+4-5+6-7+.......+16-17+18-19+20

Answer 2

Solution:

a=5+2√6

b= = x

⇒

⇒

⇒5-2√6

So a²+b²

    ⇒ (5+2√6)² + (5-2√6)²

    ⇒ 25+24+20√6 + 25+24-20√6

    ⇒ 49+49

    ⇒ 98