Can someone show me the steps to these questions (I will provide the correct answers)? Thanks in advance.
1. When the polynomials 4x^3 + mx^2 + nx + 11 is divided by x + 2, the remainder is -7. When the polynomial is divided by x - 1, the remainder is 14. What are the values of m and n? Answer is: m = 2, n = -3
2. For what value[s] of k does the function f(x) = x^3 + 6x^2 + kx - 4 give the remainder when divided by either x - 1 or x +2? Answer: k = 3
3. When (x^2 + 5x + 7) is divided by (x+k), the remainder is 3. Determine k. Answer: k = 1 or k = 4