Question

Aratati ca :$\frac{2x+6}{ x^{2} +4x+3} = \frac{2}{x+1} ,pentru oricare x apartine \{-3,-1}$

Answer 1

$\frac{2(x+3)}{ x^{2} +3x+x+3)} = \frac{2(x+3)}{(x+3)(x+1)}= \frac{2}{x+1}$
=> $\frac{2}{x+1} = \frac{2}{x+1}$