x^2-2xy-2y^2 因式分解

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x^2-2xy-2y^2因式分解x^2-2xy-2y^2因式分解x^2-2xy-2y^2因式分解(x-y)^2-3y^2=(x-y-√3y)(x-y+√3y)原式=(x-y)^2-3y^2=(x-y+

x^2-2xy-2y^2 因式分解
x^2-2xy-2y^2 因式分解

x^2-2xy-2y^2 因式分解
(x-y)^2-3y^2
=(x-y-√3 y)(x-y+√3 y)

原式=(x-y)^2-3y^2
=(x-y+根号3y)(x-y-根号3y)

x^2-2xy-2y^2=x^2-2xy+y^2-3y^2
=(x-y)^2-3y^2
=(x-y+3y)(x-y-3y)
=(x+2y)(x-4y)