Question

Expand (4x-3y)^4 using pascal's triangle

Answer 1

Fourth row of pascal: 1 4 6 4 1

since it's the y has a minus, the + and - signs will alternate:

\[(4x)^4 - 4 * (4x)^3(3y)^1 + 6 * (4x)^2(3y)^2 - 4 * (4x)^1 (3y)^3 + (3y)^4\]

Final version:

256 x^4-768 x^3 y+864 x^2 y^2-432 x y^3+81 y^4

Answer 2

Thank you