Help with alg2 problem simple but idk how

[From: ] [author: ] [Date: 11-12-12] [Hit: ]

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For which values of b is x + 1 a factor of x^2 + bx + 1

-

x= -1
(-1)^2-b+1=0
1-b+1
2-b=0
b=2

1

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