Question

B4 пожалуйста!!! 40б

Answer 1

$frac{1}{x} = frac{x}{2x+1} \x neq 0\x neq - frac{1}{2} \2x+1=x^2\x^2-2x-1=0\D_1=1+1=2\x_1=1+ sqrt{2} \x_2=1- sqrt{2} \x_1^2+x_2^2\(1+ sqrt{2})^2+(1- sqrt{2})^2=1+2 sqrt{2}+2+1-2 sqrt{2} +2=1+2+1+2=\=6$