Question

simplificati rapoartele :
a)x²+3x/x²-9
b)x²-49/x²+14x+49
va roooggggggggggggg

Answer 1

x²+3x/x²-9=x(x+3)/(x-3)(x+3)=x/x-3;
x²-49/x²+14x+49=(x-7)(x+7)/(x+7)²=x-7/x+7;
Bafta!

Answer 2

$\frac{x^{2}+3x }{ x^{2} -9}$ = $\frac{x(x+3)}{(x+3)(x-3)}$
Vom simplifica x+3 : $\frac{x}{x-3}$ Fractia are sens doar pentru 
x ≠ 3 si x ≠ -3 .
$\frac{x^{2} -49}{ x^{2} +14x+49}$ = $\frac{(x+7)(x-7)}{ (x+7)^{2} }$ 
Vom simplifica x+7 : $\frac{x-7}{x+7}$ Fractia are sens doar pentru
x ≠ -7 .