计算[(1/2x-y)^2+(1/2x+y)^2](1/2x^2-2y^2)要过程
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计算[(1/2x-y)^2+(1/2x+y)^2](1/2x^2-2y^2)要过程计算[(1/2x-y)^2+(1/2x+y)^2](1/2x^2-2y^2)要过程计算[(1/2x-y)^2+(1/2
计算[(1/2x-y)^2+(1/2x+y)^2](1/2x^2-2y^2)要过程
计算[(1/2x-y)^2+(1/2x+y)^2](1/2x^2-2y^2)要过程
计算[(1/2x-y)^2+(1/2x+y)^2](1/2x^2-2y^2)要过程
=(¼x²+y²)×2×(½x²-2y²)
=(½x²+2y²)(½x²-2y²)
=¼x^4-4y^4
整个题就是(a+b)(a-b)=a²-b²的反复运用
=【(1/4x²+y²)*2】*(1/2x²-2y²)
=(1/2x²+2y²)*(1/2x²-2y²)
=1/4x•4-4y•4
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