Question 1057980
{{{2/(sqrt(x) + 9) = (2/(sqrt(x) + 9))((sqrt(x) - 9)/(sqrt(x) - 9))}}}


{{{2/(sqrt(x) + 9) = ( (2sqrt(x) - 18) / ( (sqrt(x) + 9) (sqrt(x) - 9) )   )}}}


{{{2/(sqrt(x) + 9) = ( (2sqrt(x) - 18) / ( (sqrt(x))^2 +9sqrt(x) - 9sqrt(x) - (9)^2 )   )}}}


{{{2/(sqrt(x) + 9) = ( (2sqrt(x) - 18) / ( x - 81 ) )}}}