((3x-x^2)/(x^2-6x+9)+2x/(2x+5))*(2x^2-x-15)=-11x
1). (3x-x^2)/(x^2-6x+9)=(x(3-x))/((x-3)(x-3))=(x(3-x))(-(3-x)(x-3))=x/(-(x-3))
2). 2x/(2x+5)+x/(-(x-3))= (-2x(x-3)+x(2x+5))/(-(2x+5)(x-3))= (-2x^2+6x+2x^2+5x)/(-(2x^2-6x+5x-15))= 11x/(-(2x-x-15))
3). 11x/(-(2x^2-x-15))*(2x^2-x-15)=-11x