Giải phương trình: \({x^2} + 28x - 128 = 0\)
A.\(\left[ \begin{array}{l}x = 4\\x = - 32\end{array} \right.\)
B.\(\left[ \begin{array}{l}x = - 4\\x = 32\end{array} \right.\)
C.\(\left[ \begin{array}{l}x = 4\\x = 32\end{array} \right.\)
D.\(\left[ \begin{array}{l}x = - 4\\x = - 32\end{array} \right.\)