x(x-y) ²-y(y-x)²
=x(x-y) ²-y(x-y)²
=(x-y)³
18(a-b)³-12b(b-a)²
=18(a-b)³-12b(a-b)²
=6(a-b)²(3a-5b)
x(x+y)(x-y)-x(x+y)²
=x(x+y)(-2y)
=-2xy(x+y)
x(x-y) ²-y(y-x)²
=x(x-y) ²-y(x-y)²
=(x-y)³
18(a-b)³-12b(b-a)²
=18(a-b)³-12b(a-b)²
=6(a-b)²(3a-5b)
x(x+y)(x-y)-x(x+y)²
=x(x+y)(-2y)
=-2xy(x+y)