agubaidullina03

x^3+5x^2-4x-20/x^2+3x-10

x^2(x+5)-4(x+5)/x^2+5x-2x-10

(x+5)(x^2-4)/x(x+5)-2(x+5)

(x+5)(x-2)(x+2)/(x+5)(x-2)

x+2