Question

решите уравнение )$frac{x}{x-5} + frac{3x+15}{ x^{2} -25} =$

Answer 1

x/(x-5)+(3x15)/(x²-25)=(x(x+5)+3x+15)/(x+5)(x-5)=
=(x²+5x+3x+15)/(x+5)(x-5)=(x²+8x+15)/(x+5)(x-5)=
=(x+3)(x+5)/(x+5)(x-5)=(x+3)/(x+5)