Question

Expand: (2s-3t)^5

Answer 1

binomial?

Answer 2

Yea.

Answer 3

dont u know the formula ?

Answer 4

Wasnt given one.

Answer 5

FAIL.

Answer 6

http://mathsteaching.files.wordpress.com/2008/05/binomial-expansion-formula.jpg
First sentence.

Answer 7

How am I a fail? I wasnt given one or taught one..

Answer 8

Then how they taught you Binomial expansion?

Answer 9

32 s^5-240 s^4 t+720 s^3 t^2-1080 s^2 t^3+810 s t^4-243 t^5

Answer 10

No, teacher gave me a page of them to do.

Answer 11

Thank you, Eyad.

Answer 12

yw :)

Answer 13

Direct answers! D:

Answer 14

Under your explanation and your rule :P

Answer 15

You werent helping much, lol. Just telling me that I was a fail. @saifoo.khan
Yea, teamwork :)@Eyad

Answer 16

(2s-3t)^5
Just expand
\[^5C_0(-3t)^0(2s)^5=\]
\[^5C_1(-3t)^1(2s)^4=\]
\[^5C_2(-3t)^2(2s)^3=\]
\[^5C_3(-3t)^3(2s)^2=\]
\[^5C_4(-3t)^4(2s)^1=\]
\[^5C_5(-3t)^5(2s)^0=\]

Answer 17

And that will be my written answer? Or will I have to expand it further?

Answer 18

(p+q)^5
no, you have to use the formula \[^nC_r(q)^r(p)^{n-r}\]