Find kkk such that (x+4)(x + 4)(x+4) is a factor of x3+2x2−kx+8x^3 + 2x^2 - kx + 8x3+2x2−kx+8.
k=5k = 5k=5
k=4k = 4k=4
k=−3k = -3k=−3
k=1k = 1k=1