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(1)12xy^2-3x^y-12y^3(2)4-12(x-y)^2+9(x-y)^4
题目详情
(1)12xy^2-3x^y-12y^3
(2)4-12(x-y)^2+9(x-y)^4
(2)4-12(x-y)^2+9(x-y)^4
▼优质解答
答案和解析
12xy^2-3x^y-12y^3
=3y(4xy-x^2-4y^2)
=-3y(x^2-4xy+4y^2)
=-3y(x-2y)^2
4-12(x-y)^2+9(x-y)^4
=[3(x-y)^2-2]^2
=(√3x-√3y+√2)^2(√3x-√3y-√2)^2
=3y(4xy-x^2-4y^2)
=-3y(x^2-4xy+4y^2)
=-3y(x-2y)^2
4-12(x-y)^2+9(x-y)^4
=[3(x-y)^2-2]^2
=(√3x-√3y+√2)^2(√3x-√3y-√2)^2
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