Stacey's text messaging plan charges 25¢ 25
⁢
¢
for each message over 650
650
in addition to a $12
$
⁢
12
base charge. If she owes $60.75
$
⁢
60.75
for text messaging in the month of April, how many text messages did she send that month?

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.

do your own work and don"t cheat.

step-by-step explanation: