Question

If x=2-√2 ,find the value of x²+ 1/x²

Answer 1

Answer:

ײ = (2)² - (/2)²

= 4 - 2

= 2

as per equation,

x² +1/x²

= 2+1/2

=4/2+1/2

=5/2

=2.5

Answer 2

x=2-√2

x²=(2-√2)²

=2²+2×2×√(2+(√(2))²

=4+2+4√(2

6+4√(2)+1/6+2√(2)

6+4√(2)+3-√(2)

9+3√(2