two *(x*(x - three)/(x - four)^ two + one - (two *x - three)/(x - four))/(x - four) = zero
2 multiply by (x multiply by (x minus 3) divide by (x minus 4) squared plus 1 minus (2 multiply by x minus 3) divide by (x minus 4)) divide by (x minus 4) equally 0
two multiply by (x multiply by (x minus three) divide by (x minus four) to the power of two plus one minus (two multiply by x minus three) divide by (x minus four)) divide by (x minus four) equally zero