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)^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
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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