The correct answer is B
Explanation
Division by 0 is not defined, so is not defined when (x +3) (x -4) =0. The product (x +3) (x -4) is equal to 0，if x =-3 or if x =4. Therefore, y is defined for all of the choices except - 3.
The correct answer is B
Explanation
Division by 0 is not defined, so is not defined when (x +3) (x -4) =0. The product (x +3) (x -4) is equal to 0，if x =-3 or if x =4. Therefore, y is defined for all of the choices except - 3.