Question

expand (s-3y)^5

Answer 1

The answer would look similar to this
s^5 + s^4t+ s^3t^2+ s^2t^3 +st^4+t^5
we have to figure out the coeficcient

Answer 2

t as in y

Answer 3

\[s^5-15 s^4 y+90 s^3 y^2-270 s^2 y^3+405 s y^4-243 y^5 \]

Answer 4

1 5 10 10 5 1 as coeffs to start with :)

Answer 5

There is something called

1(1)^5(-3y)^0 5(1)^4(-3)^1 10(1)^3(-3)^2 10(1)^2(-3)^3 5(1)^1(-3)^4 1(1)^0(-3)^5

Answer 6

pascal triangle