(3x-5)/(x^2+3x)*(2x^2-7x)/(6x-10) (x^2+x-6)/(x+5):(x-2)/(x^2+2x-15)

(3x-5)/(x^2+3x)*(2x^2-7x)/(6x-10)=((3x-5)*(2x^2-7x))/((x^2+3x)*(6x-10))= =(6x^3-21x^2-10x+35x)/(6x^3-10x^2+18x^2-30x)=(6x^3-21x^2+25x)/(6x^3+8x^2-30x)= =(6x^2-21x+25)/(6x^2+8x-30)

(x^2+x-6)/(x+5):(x-2)/(x^2+2x-15)=(x^2+x-6)/(x+5)*(x^2+2x-15)/(x-2)= =((x^2+x-6)*(x^2+2x-15))/((x+5)*(x-2))= =(x^4+2x^3-15x^2+x^3+2x^2-15x-6x^2-12x+90)/(x^2-2x+5x-10)= =(x^4+3x^3-19x^2-90)/(x^2+3x-10) Mam nadzieję, że nigdzie się nie pomyliłam :)