- four *(two *x + (one - four *(x - one)^ two /(x*(x - two)))*(x + one) - two)/(x^ two *(x - two)^ two) = zero
minus 4 multiply by (2 multiply by x plus (1 minus 4 multiply by (x minus 1) squared divide by (x multiply by (x minus 2))) multiply by (x plus 1) minus 2) divide by (x squared multiply by (x minus 2) squared ) equally 0
minus four multiply by (two multiply by x plus (one minus four multiply by (x minus one) to the power of two divide by (x multiply by (x minus two))) multiply by (x plus one) minus two) divide by (x to the power of two multiply by (x minus two) to the power of two) equally zero