Write a rule for the sequence.
5,-4,-13,-

a. start with -9 and add 5 repeatedly
b. start with 5 and add 9 repeatedly
c. start with 5 and subtract -9 repeatedly
d. start with 5 and add -9 repeatedly

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.