Question

Rezolvati:
E(x)=$\frac{x^{2} -4}{ x^{2} -4x +4}$

Answer 1

$x^{2} -4 = (x-2)(x-2)$

[tex] x^{2} -4x+4=0 =\ \textgreater \ (x-2)(x-2) a=1 b=-4 c=4 delta = b^{2}-4ac (-4)^{2}-4*1*4 = 16-16 = 0 (delta = 0 =\ \textgreater \ o radacina) x_{1}= \frac{4+0}{2}= \frac{4}{2}=2 [/tex]

$REZULTATUL =\ \textgreater \ \frac{(x-2)(x-2)}{(x-2)}$