几个计算题1.(X-Y+1)^2-(X+Y+1)^22.(1-X)(1+X)(X^2+1)(X^4+1)

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几个计算题1.(X-Y+1)^2-(X+Y+1)^22.(1-X)(1+X)(X^2+1)(X^4+1)

几个计算题1.(X-Y+1)^2-(X+Y+1)^22.(1-X)(1+X)(X^2+1)(X^4+1)
几个计算题
1.
(X-Y+1)^2-(X+Y+1)^2
2.
(1-X)(1+X)(X^2+1)(X^4+1)

几个计算题1.(X-Y+1)^2-(X+Y+1)^22.(1-X)(1+X)(X^2+1)(X^4+1)
1.
（x－y＋1）^2－(x+y+1)^2
=[（x－y＋1）+(x+y+1)] *[（x－y＋1）－(x+y+1)]
=2(x+1) *(-2y)
=-4y(x+1)
=-4xy-4y
2.
(1－x)(1＋x)(x^2+1)(x^4+1)
=(1-x^2)(x^2+1)(x^4+1)
=(1-x^4)(x^4+1)
=1-x^8

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