aa-bb-xx+yy-2ay+2bx因式分解

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aa-bb-xx+yy-2ay+2bx因式分解
aa-bb-xx+yy-2ay+2bx因式分解

aa-bb-xx+yy-2ay+2bx因式分解
aa-bb-xx+yy-2ay+2bx
=(a^2-2ay+y^2)-(x^2-2bx+b^2)
=(a-y)^2-(x-b)^2
=[(a-y)+(x-b)][(a-y)-(x-b)]
=(a+x-b-y)(a-x-y+b)

aa-bb-xx+yy-2ay+2bx
=(a^2-2ay+y^2)-(b^2-2bx+x^2)
=(a-y)^2-(b-x)^2
=(a-y+b-x)(a-y-b+x)