Businesses that offer repayment plans for purchases are required by law to disclose the interest rate. But that doesn't mean they go out of their way to let you know what it is. You have to read all the paperwork. Find the interest rate for the following purchase.
To finance a new laptop, Emilie is offered a 5 year payment plan with low monthly payments of $32.90. The cost of the laptop was $884.55 including tax. Round
to one decimal place, if necessary.

the answer is 62.8 cubic units

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol

hello from mrbilldoesmath!

answer:   (7x + 6y) ( 49x^2 - 42xy + 36y^2)

discussion:

in general, the factorization of a^3 + b^3 is

a^3 + b^ 3 = (a + b) ( a^2 - ab + b^2)

in our case note that 343 = 7^3 and 216 = 6^3 so the equation becomes:

343x^3 + 216y^3 = (7x)^3 + (6y)^3

if you think of a (above) as 7x and b as 6y the factorization becomes

343x^3 + 216y^3 =

((7x + 6y) (   (7x)^2 - 7x*6y + (6y)^2)   =

(7x + 6y) ( 49x^2 - 42xy + 36y^2)

you,

mrb

(a + b) (a^2 - a b + b^2)