Here is the question:
I have posted a link there to this topic so the OP can view my work.Can someone help me please?
Question: The term independent of x in the expansion of ((3x^2) - (t/x))^6 is 2160.
Given that t > 0, find the value of t.
Solution so far:
Formula - (n r) ((x)^n-r) ((y)^r)
(6 r) ((3x^2)^6-r) (-t/x)^r
However, I don't know where to go from here. I am supposed to get:
and then from that I am supposed to get r = 4
and then t = 2