计算 (1-2X)(1+2X)(1+4X^2)(1+16X^4)
6个回答
=(1-2x)(1+2x)[1+(2x)^2][1+(2x)^4]
=[1-(2x)^2][1+(2x)^2][1+(2x)^4]
=[1-(2x)^4][1+(2x)^4]
=1-(2x)^8
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