binomial theorem expand (5+2y)^3

Question

sandra · Answer

http://en.wikipedia.org/wiki/Binomial_theorem these things follow a pattern, and this one ends up: 8y^3 + 60y^2 +150y +125

sandra · Answer

you could also solve this by multiplying (5+2y)(5+2y)(5+2y)  (the first set of terms, and then the second

anonymous · Answer

thank you ive been working on this for hoursssss

sandra · Answer

ok no problem!

anonymous · Answer

i have  another.. if you dont mind. two actually. 
(x-2y)^4

(1/3 + x)^3

anonymous · Answer

its not homework. like review problems. but my teacher is horrible at teaching.

anonymous · Answer

5$$5^{3}+3(5)^{2}2y+3(5)(2y)^{2}+(2y)^{3}$$

anonymous · Answer

go to google it will give you answers i've tryed it but sometimes it doesnt work

anonymous · Answer

use pascals triangle for the coefficients
                  1
               1     1
           1      2     1
     1        3      3     1

anonymous · Answer

i dont understand that because i wasnt in class. i understood the answer you just gave though..

anonymous · Answer

like (x-2y)^4 expand.. 
how would i do that.

anonymous · Answer

$$x ^{4}+4x ^{3}(-2y)+6x ^{2}(-2y)^{2}+4x(-2y)^{3}+(-2y)^{4} $$

the next row of the triangle would be   1  4  6  4 1

anonymous · Answer

what do you mean ^^^ is that the final answer?>