已知(x+y)2 =2,(x-y)3 =3,求(x+y)7(x-y)2(x+y)3(y-x)4 的值
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(x+y)^7(x-y)^2(x+y)^3(y-x)^4
=(x+y)^7(x-y)^2(x+y)^3(x-y)^4
=(x+y)^(7+3)(x-y)^(2+4)
=(x+y)^10(x-y)^6
=[(x+y)^2]^5[(x-y)^3]^2
=2^5*3^2
=32*9
=288
=(x+y)^7(x-y)^2(x+y)^3(x-y)^4
=(x+y)^(7+3)(x-y)^(2+4)
=(x+y)^10(x-y)^6
=[(x+y)^2]^5[(x-y)^3]^2
=2^5*3^2
=32*9
=288
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(x+y)7(x-y)2(x+y)3(y-x)4=(x+y)^10(x-y)^6
=[(x+y)^2]^5*[(x-y)^3]^2
=2^5*3^2
=288
=[(x+y)^2]^5*[(x-y)^3]^2
=2^5*3^2
=288
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