(x-y)²-(z-m)²求因式分解

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(x-y)²-(z-m)²求因式分解

(x-y)²-(z-m)²求因式分解
(x-y)²-(z-m)²求因式分解

(x-y)²-(z-m)²求因式分解
(x-y)²-(z-m)²
=(x-y+z-m)(x-y-z+m)

由a²-b²=(a+b)(a-b)可得,(x-y)²-(z-m)²=[(x-y)+(z-m)][(x-y)-(z-m)]=(x-y+z-m)(x-y-z+m)