Question

$E(x)=(1 supra x-2-xsupra x^{2} -4):2 supra (x-2)(x+2)$
va roog ajutati-ma!

Answer 1

Ex=( 1/x-2 -x/(x-2) (x+2) ) * (x-2)(x+2)/2
=(x+2-x)/(x-2)(x+2) *(x-2)(x+2)/2
=1