Step 1 :The given problem is to perform synthetic division on the polynomial \(4x^{5} + 23x^{4} + 14x^{3} + x^{2} + 28x - 12\) by the divisor \(x + 5\).
Step 2 :Synthetic division is a shorthand method of dividing polynomials where we divide the coefficients of the polynomial with the divisor.
Step 3 :Performing the synthetic division, we get the quotient as \(4x^{4} + 3x^{3} - x^{2} + 6x - 2\) and the remainder as \(-\frac{2}{x+5}\).
Step 4 :\(\boxed{4x^{4} + 3x^{3} - x^{2} + 6x - 2 - \frac{2}{x+5}}\) is the final result of the synthetic division.