SOLUTION: What is the upper limit for the zeros of the function P(x) = 4x^4 + 8x^3 - 7x^2 - 21x - 9

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Question 694298: What is the upper limit for the zeros of the function
P(x) = 4x^4 + 8x^3 - 7x^2 - 21x - 9
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
What is the upper limit for the zeros of the function
P(x) = 4x^4 + 8x^3 - 7x^2 - 21x - 9
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Ans: 2 is an upper limit.
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Use synthetic division.
2)....4....8....-7....-21....-9
.......4....16...25....29....|49
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Comment: Since the coefficients of the quotient
and the remainder are all positive, 2 is an upper limit.
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Note: It is not THE upper limit. Any number greater than
2 is also an upper limit.