Question

Efectuati: $\frac{3}{5 x^{2}( x^{2} -9) } - \frac{1}{ x^{2} } - \frac{8}{ x(x^{2} -9)}$

Answer 1

aducem la acelasi numitor 5x patrat(xpatrat-9)=>(3-5 x patrat+45-40x)/5xpatrat(xpatrat-9)=-5 x patrat-40x+48)/5xpatrat(x-3)(x+3)