When brooke buys lunch at the cafeteria,
money is withdrawn from a lunch account.
the table shows amounts withdrawn in
one week. by how much did the amount in
brooke's lunch account change by the end
of that week?
lunch account
lunch cost
week 1
balance
$28
monday
tuesday
wednesday
thursday
friday
pizza
fish tacos
spaghetti
sandwich
chicken
$4
$4. math

109 is the nearest whole number/final answer! : )

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.