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What is a quartic function with only the two real zeros given?


x = -4 and x = -1

Ay = x4 + 5x3 + 5x2 + 5x + 4

By = x4 - 5x3 - 5x2 - 5x - 4

Cy = -x4 + 5x3 + 5x2 + 5x + 4

Dy = x4 + 5x3 + 5x2 + 5x - 5

Verified Answer :


The values will be substituted to the respective functions and see if they equal to zero.
a. f(-4) = 0,    f(-1) = 0
b. f(-4) = 512,  f(-1) = 2 
c. f(-4) = -512, f(-1) = -2
d. f(-4) = -8,   f(-1) = -8
Therefore, A.
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