Question

Se considera expresia $E(x)=( \frac{(x+2)^{2} }{ x^{2} +4} -1): \frac{x}{ x^{2} +4}$ , unde x este numar real , $x \neq 0$ . Aratati ca E(x)=4.

Answer 1

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

Answer 2

Am reusit sa fac o poza cu ce am facut