PLEASE HELP Use the binomial theorem to find the binomial expansion of the given expression.
(2x-3y)^5

Question

PLEASE HELP> Use the binomial theorem to find the binomial expansion of the given expression. 
(2x-3y)^5

anonymous · Answer

use the formula :)
nCr (2x)^r-1(-3y)r

anonymous · Answer

r is the power :) so u strt from 0 to 5. n will be 5 throughout

timaashorty · Answer

What does the r stand for?

timaashorty · Answer

I mean C.*

anonymous · Answer

C is the part of formula. do you have scientific calculator?

timaashorty · Answer

no but i can use an online one

anonymous · Answer

attachment

anonymous · Answer

okie u see its clearly written on the button nCr u press that on some shift button has to be used first

anonymous · Answer

http://www.picalc.com/ theres ncr on this one

timaashorty · Answer

can you show me using this? https://mathway.com/

timaashorty · Answer

I'm pretty confused. What you wrote on a paper, i plug it into the calculator?

anonymous · Answer

can find the nCr function on that one :S

anonymous · Answer

all u have to plug into the calculator is to find the value of nCr.
okie Look. binomial theorem is a formula. it has nCr in it.
n is always the power of the whole thing in the brackets. So in this one its 5 so it will remain 5. r on the other hand is the the range from 0-5 cuz the max power is 5 in this one. so using the formula nCr (2x)^r-1(-3y)^r u will expand the  expression

timaashorty · Answer

nevermind I got help in wolfram! thank you so much for the help!

anonymous · Answer

no problem :)