Question

my answer is b
Divide 3x2 - 11x - 4 by x - 4. (2 points)
Answer

x + 1

x - 23

3x + 1

3x - 23

Answer 1

The answer is C, do you need help understanding why?

Answer 2

If you factor, it will be like: (3x+a)(x-4). So you have to find a.
Expanding again gives:
3x² -12x+ax-4a = 3x²+(a-12)x-4a.

You can now see what a is, by looking at the constant term (must be -4) or at the coefficient of x (must be -11).