Question

the answer is k=6 ...please solve it in detail .answer it honestly. best answer will get the most brainiliest answer.....please be quick

Answer 1

8x^3-kx^2-x+2
=8×-1/8+k/4+1/2+2
=-1+1/2+2=-k/4
=-2+1+4/2=-k/4
=3/2=-k/4
6=-k
k=6

Answer 2

8xcube-kxsquare-x+2
x=-1/2
.:8(-1/2)cube-k(-1/2)square-(-1/2)+2=0
8*1/8-k*1/4+1/2+2=0
1-k/4+1/2+2=0
4-k+2+8=0
14-k=0
.:k=14



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