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