Question

plz answer this question​

Answer 1

Answer:

a)

x=1-√2

1/x=1/(1-√2) =(1+√2) /(1²-2) =-(1+√2)

x+1/x=1-√2-(1+√2) =-2√2

b)

(x+1/x) ²=x²+1/x²+2

(-2√2) ²-2=x²+1/x²

x²+1/x²=8-2=6

x²+1/x² =6