Question

1.(x-y)^5·(y-x)^4·(x-y)^3 2.a^2·a^3+a·a^5 3.2^2004x(-2)^2004

Answer 1

1.(x-y)^5·(y-x)^4·(x-y)^3

=（x-y）^5·(x-y)^4·(x-y)^3

=(x-y)^12

2.a^2·a^3+a·a^5

=a^5+a^6

3.2^2004x(-2)^2004x(-1/4)^2004

=[2×(-2)×(-1/4)]^2004

=1^2004

=1

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