two *(x - three)*(one /(x - three) - (x + three)/(x - three)^ two)/(x + three) = zero
2 multiply by (x minus 3) multiply by (1 divide by (x minus 3) minus (x plus 3) divide by (x minus 3) squared ) divide by (x plus 3) equally 0
two multiply by (x minus three) multiply by (one divide by (x minus three) minus (x plus three) divide by (x minus three) to the power of two) divide by (x plus three) equally zero