Question 469208


{{{(x^3-19x-30)/(x+3)}}}

={{{(x^3-9x-10x-30)/(x+3)}}}

={{{(x(x^2-9)-10(x+3))/(x+3)}}}

={{{(x(x^2-3^2)-10(x+3))/(x+3)}}}

={{{(x(x-3)(x+3)-10(x+3))/(x+3)}}}

={{{(x+3)(x(x-3)-10)/(x+3)}}}

={{{cross((x+3))(x(x-3)-10)/cross((x+3))}}}

={{{x(x-3)-10}}}

={{{x^2-3x-10}}}........replace {{{-3x}}} with {{{2x-5x}}}

={{{x^2+2x-5x-10}}}

={{{x(x+2)-5(x+2)}}}

={{{(x+2)(x-5))}}}