Question 1151149
{{{ ((6-x)/(x^2+2x-3)) /(( x^2-4x-12)/(x^2+4x+3))}}} ...first factor


{{{((6-x)/((x - 1) (x + 3) )) /(( (x - 6) (x + 2) )/((x + 1) (x + 3) ))  }}}


{{{((6-x)(x + 1) (x + 3))/((x - 1) (x + 3)  (x - 6) (x + 2) )}}}....simplify


{{{((6-x)(x + 1) cross((x + 3)))/((x - 1) cross((x + 3))  (x - 6) (x + 2) )}}}


{{{((6-x)(x + 1) )/((x - 1)  (x - 6) (x + 2) )}}}...write {{{(6-x)}}} as {{{-(x-6)}}}

{{{(-(x-6)(x + 1) )/((x - 1)  (x - 6) (x + 2) )}}}....simplify


{{{(-cross((x-6))(x + 1) )/((x - 1) cross( (x - 6) )(x + 2) )}}}


{{{((-1) (x + 1))/((x - 1) (x + 2))}}} (for {{{x<>6}}})


{{{-(x + 1)/((x - 1) (x + 2))}}}