If x=-1 is a zero of the polynomial f(x) =xcube-2x^+4x+k write the value of k
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Answered by
3
Answer:
-1-2-4+k=0
K=7..........।
Answered by
0
Step-by-step explanation:
x= -1
x³-2x²+4x+k=0
(-1)³ -2(-1)² +4(-1) +k=0
-1-2-4+k=0
-3-4+k=0
-7+k=0
∴k= +7
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