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(3y²+1/2x)(1/2x-3y²)、(x-1/2)(x+1/2)(x²+1/4)、(x+y)(x-y)+(x+2y)(x-2y)
人气:165 ℃ 时间:2019-10-10 03:48:20
解答
(3y²+1/2x)(1/2x-3y²)=(1/2x+3y²)(1/2x-3y²)=(1/2x)²-(3y²)²=x²/4-9y⁴(x-1/2)(x+1/2)(x²+1/4)=(x²-1/4)(x²+1/4)=x⁴-1/16(x+y)(x-y)+(...
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