Final answer:
To complete the missing spaces in the box for 3x²-11x²+12x-4/x-1, we need to simplify the expression and factor out the greatest common factor.
Step-by-step explanation:
To complete the missing spaces in the box for 3x²-11x²+12x-4/x-1, we need to simplify the expression.
Combining like terms, we have -8x²+12x-4/x-1.
We can then factor out the greatest common factor from the polynomial, which is 4, to get 4(-2x²+3x-1)/x-1.
Therefore, the missing spaces in the box are -2x²+3x-1.