SRL Archive - Mathematics

Multiply this polynomial using the special product formulas. Express your answer as a single polynomial in standard form.

And i have to give it in this form.

Give your answer using the form AxB + CyD.

(3x - 8)^3

A=27
B=3
C=
D=

Ive completed 12/15 but i got stuck on this one. :X

if someone can do a brief explanation real quick?

i know A and B but i don't know the rest.

http://en.wikipedia.org/wiki/Binomial_theorem

That should be enough to help you out. :)

Yeah, I'm not sure if you're still looking for an answer to this or if you figured it out but it would be in the form

x^3+3(x^2y)+3(xy^2)+y^3
So .. (3x)^3 + 3((3x)^2)*8 + 3(3x)(8)^2+(8)^3
=27x^3 - 216x^2 + 576x - 512

I know I used more brackets than I had to but I thought it explained it better.

http://i54.tinypic.com/107svhi.jpg

The power (in this case: 3) corresponds to the row in Pascal's Triangle, this gives the co-efficients (1,3,3,1)

TY Naum!

I understand it alot better now the way you did it!

I have a test on Thursday so i will make more problems and try them my self :D

thanks everyone.