分式分解:4y2-x2/-x2-4y2+4xy

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分式分解:4y2-x2/-x2-4y2+4xy分式分解:4y2-x2/-x2-4y2+4xy分式分解:4y2-x2/-x2-4y2+4xy4y^2-x^2/-x^2-4y^2+4xy=(x^2-4y^

分式分解:4y2-x2/-x2-4y2+4xy
分式分解:4y2-x2/-x2-4y2+4xy

分式分解:4y2-x2/-x2-4y2+4xy
4y^2-x^2/-x^2-4y^2+4xy
=(x^2-4y^2)/(x^2-4xy+4y^2)
=(x+2y)(x-2y)/(x-2y)^2
=x+2y/x-2y

4y2-x2/-x2-4y2+4xy
=(2y-x)(2y+x)/[-(2y-x)^2]
=-(2y+x)/(2y-x)
=(x+2y)/(x-2y)