Evaluate the function at the given numbers (correct to six decimal places).

f(x) = (x^2 - 6x)/ (x^2 -x -2)

x= -0.9 y: -21.41

Webassign marked this as incorrect. How is this incorrect? I plug that exact value into the the equation on my ti 83 and got that answer. Webassign also marked me wrong for other decimal values except for

0, -.5, and 2