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(x+2y)^2-x^2-12(x-2y)^2+4y^2

来源：学生作业帮 编辑：大师作文网作业帮 分类：数学作业 时间：2024/11/16 06:19:16
(x+2y)^2-x^2-12(x-2y)^2+4y^2
(x+2y)^2-x^2-12(x-2y)^2+4y^2
(x+2y)^2-x^2-12(x-2y)^2+4y^2
=(x+2y-x)(x+2y+x)-12(x-2y)^2+4y^2
=2y(2x+2y)-12(x-2y)^2+4y^2
=4y(x+y)+4y^2-12(x-2y)^2
=4(xy+y^2+y^2)-12(x^2-4xy+4y^2)
=4(xy+2y^2-3x^2+12xy-12y^2)
=4(13xy-3x^2-10y^2)
1、x(x-y)(x+y)-x(x+y)^2 x^2-y^2/x+y-4x(x-y)+y^2/2x-y, (2x-y)^2-4(x-y)(x+2y) (2x-y)²-4(x-y)(x+2y) 化简：（2x-y)²-4(x-y)(x+y) {(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y (1)(x^2/x)-y-x-y x+2y+4y^2/x-y+4x^y/4y^2-x^2 【(x-y)^2+(x+y)(x-y)】除以 2x (x-y)^2+12(x-y)+36 4x(y-x)-y^2因式分解 (x+3y-4)(2x-y)