Question

Fie E(x)=x la a doua -4
Supra x la a doua -4x + 4
Aratati ca E(x)=4 supra x-2

Answer 1

$\frac{xpatrat-4}{xpatrat-4x+4}$=$\frac{(x-2)(x+2)}{(x-2)la a doua}$     se simplifica exponentul 2 cu x-2 si ramane =$\frac{x+2}{x-2}$

Answer 2

x^2-4/x^2-4x+4=(x-2)(x+2)/(x-2)^2=x+2/x-2