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Domino
Mathematics
24 July, 17:50
Find all zeros of
f (x) = x^3 + 3x^2 - 3x - 1
+3
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1
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Anna
24 July, 18:12
0
F (1) = 1^3 + 3 (1) ^1 - 3 - 1 = 1 + 3 - 3 - 1 = 0
so one zero is x = 1, and x-1 is a factor
dividing f (x) by x - 1 gives x^2 + 4x + 1
x = [-4 + / - sqrt (16 - 4) ] / 2
x = - 0.27, - 3.73
zeroes are 1, - 0.27 and - 3.73 Answer
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