计算:(x-1/6y)(2x+1/3y)(3x^2+1/12y^2)
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计算:(x-1/6y)(2x+1/3y)(3x^2+1/12y^2)
![计算:(x-1/6y)(2x+1/3y)(3x^2+1/12y^2)](/uploads/image/z/17286859-19-9.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%9A%28x-1%2F6y%29%282x%2B1%2F3y%29%283x%5E2%2B1%2F12y%5E2%29)
(x-1/6y)(2x+1/3y)(3x^2+1/12y^2)
=(2x²-1/3xy+1/3xy-1/18y²)(3x²+1/12y²)
=(2x²-1/18y²)(3x²+1/12y²)
=6x⁴-1/6x²y²+1/6x²y²-1/216y⁴
=6x⁴-1/216*y⁴
=(2x²-1/3xy+1/3xy-1/18y²)(3x²+1/12y²)
=(2x²-1/18y²)(3x²+1/12y²)
=6x⁴-1/6x²y²+1/6x²y²-1/216y⁴
=6x⁴-1/216*y⁴
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