Find the valu of k for which (×-1)
is a factor of (2×^3 + 9 ×^2+×+k)
Answers
Answered by
0
Answer:
2(1)³+9(1)²+1+k=0
2+9+1+k=0
12+k=0
k=-12
Answered by
0
Answer:
k=-12
Step-by-step explanation:
f(x)=(2×^3 + 9 ×^2+×+k)
if (×-1)is a factor,then making x=1would make(×-1) equal to 0,and everything else in the equation multiply by that 0, resulting to
f(1)=0.
f(1)=2.1³+9.1²+1+k=0
f(1)=2+9+1+k=0
k=-(2+9+1)=-12
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