Question

equation

Answer 1

i think u missed x there (x^2 + 2 - 3)
it should be (x^2 + 2x - 3)

Answer 2

x^3 - 2x^2 - 11x + 12 = 0

Answer 3

and check whether u get x^3-2x^2-11x+12=0 as final answer.