Question

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

x = -4 and x = -1
A. y = x4 + 5x3 + 5x2 + 5x + 4
B. y = x4 - 5x3 - 5x2 - 5x - 4
C. y = -x4 + 5x3 + 5x2 + 5x + 4
D. y = x4 + 5x3 + 5x2 + 5x - 5

not "C"

Answer 1

A. f(x) = x^4 + 5x^3 + 5x^2 + 5x + 4

Answer 2

I. Descartes' Rule of Signs and Rational Roots Theorem

II. f(-4) and f(-1) = 0 found by verification

III. process of Elimination... Cannot be B,C or D

Answer 3

thank you sooo much

Answer 4

np

Answer 5

could u help me with some more

Answer 6

sure