solve the problem
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Answer:
x^2 - x + 1 = 0
x + 1 = 0
(-1) + 1 = 0
b) x^2 + 3x + 6
-1^2 + 3x + 6
-1 + 3*1 + 6
-1 + 3 + 6
2 + 6
= 8
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