Question

Упростить выражение: $\frac{9x^2}{x^2-9} : \frac{3x}{2x-6} + \frac{6x}{x-3}$

Answer 1

9x²/(x-3)(x+3)*2(x-3)/3x=6x/(x+3)
6x/(x+3) +6x/(x-3)=[6x(x-3+x+3)/(x²-9)=12x²/(x²-9)