Consider the following table of the ages of our first six presidents
ages of the first 6 presidents at inauguration
washington 57
j. adams 61
jefferson 57
madison 57
monroe 58
jq adams 57
find the mean of the data set
(57+61+57+57+58+57)/6 = 347/6 = 57.83
find the standard deviation (showing all work)
how many of the presidentsí ages fall within one standard deviation of the mean?

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.