Question

find : (x-y)^3 * (x-Y) = ?

Answer 1

Answer:

$(x - y) {}^{3} \times (x - y) = (x {}^{3} - 3x {}^{2} y + 3xy {}^{2} - y {}^{3} ) \times (x - y) \\ = (x {}^{4} - 3x {}^{3} y + 3x {}^{2} y {}^{2} - xy \\ {}^{3} - x {}^{3} y + 3x {}^{2} y {}^{2} - 3x {}^{} y {}^{3} + y {}^{4} ) \\ = x {}^{4} - 4x {}^{3} y + 6x {}^{2} y {}^{2} - 4xy {}^{3} + y {}^{4}$