(x-y)^2+4xy-y^2因式分解

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(x-y)^2+4xy-y^2因式分解(x-y)^2+4xy-y^2因式分解(x-y)^2+4xy-y^2因式分解(x-y)^2+4xy-y^2=x²-2xy+y²+4xy-y^2

(x-y)^2+4xy-y^2因式分解
(x-y)^2+4xy-y^2因式分解

(x-y)^2+4xy-y^2因式分解
(x-y)^2+4xy-y^2
=x²-2xy+y²+4xy-y^2
=x²+2xy
=x(x+2y)

x²-2xy+y²+4xy-y²
=x²+2xy
=x(x+2y)

(x-y)²+4xy-y²=﹙x+y﹚²-y²=﹙x+y-y﹚﹙x+y+y﹚=x﹙x+2y﹚.