(one - (x + two)/(x - two))*(- one /(x + two) - one /(x - two))/(x + two) = zero
(1 minus (x plus 2) divide by (x minus 2)) multiply by ( minus 1 divide by (x plus 2) minus 1 divide by (x minus 2)) divide by (x plus 2) equally 0
(one minus (x plus two) divide by (x minus two)) multiply by ( minus one divide by (x plus two) minus one divide by (x minus two)) divide by (x plus two) equally zero