Question

Exercițiul 5 plssss

Answer 1

$E(x)= \frac{x+2- x^{2} }{x+2}* \frac{x^2+x-2}{x-2}+ x^{2} = \frac{x^3+ x^{2} -2x+2 x^{2} +2x-4-x^4-x^3+2 x^{2} +x^4-4 x^{2} }{ x^{2} -4} \\ = \frac{ x^{2} -4}{ x^{2} -4}=1$