two *(one - (two *x - nine)/(x - twelve) + (x^ two - nine *x + eighteen)/(x - twelve)^ two)/(x - twelve) = zero
2 multiply by (1 minus (2 multiply by x minus 9) divide by (x minus 12) plus (x squared minus 9 multiply by x plus 18) divide by (x minus 12) squared ) divide by (x minus 12) equally 0
two multiply by (one minus (two multiply by x minus nine) divide by (x minus twelve) plus (x to the power of two minus nine multiply by x plus eighteen) divide by (x minus twelve) to the power of two) divide by (x minus twelve) equally zero