Question

Find the root(s) of f (x) = (x + 5)3(x - 9)2(x + 1). -5 with multiplicity 3 5 with multiplicity 3 -9

Answer 1

a. -5 with multiplicity 3

d. 9 with multiplicity 2

f. -1 with multiplicity 1

Explanation:

edge

Answer 2

-5, multiplicity 3; +9, multiplicity 2; -1

Explanation:

The roots of f(x) are those values of x that make the factors be zero. For a factor of x-a, the root is x=a, because a-a=0. If the factor appears n times, then the root has multiplicity n.

f(x) = (x+5)^3(x-9)^2(x+1) has roots ...

• -5 with multiplicity 3
• +9 with multiplicity 2
• -1