x^2-y^2-2x-4y-3因式分解

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x^2-y^2-2x-4y-3因式分解x^2-y^2-2x-4y-3因式分解x^2-y^2-2x-4y-3因式分解x^2-y^2-2x-4y-3=(x-1)^2-(y^2+4y+4)=(x-1)^2-

x^2-y^2-2x-4y-3因式分解
x^2-y^2-2x-4y-3因式分解

x^2-y^2-2x-4y-3因式分解
x^2-y^2-2x-4y-3
=(x-1)^2-(y^2+4y+4)
=(x-1)^2-(y+2)^2
=(x-1+y+2)*(x-1-y-2)
=(x+y+1)*(x-y-3)

(x-y-3)(x+y+1)