分解因式 x(x-y)^2-y(x-y) 2ab(a-2)-8b(a-1)(a-2)
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x(x-y)^2-y(x-y)
=(x-y)[x(x-y)-y]
=(x-y)(x^2-xy-y)
2ab(a-2)-8b(a-1)(a-2)
=2b(a-2)[a-4(a-1)]
=2b(a-2)[a-4a+4]
=2b(a-2)(-3a+4)
=2b(a-2)(4-3a)
=(x-y)[x(x-y)-y]
=(x-y)(x^2-xy-y)
2ab(a-2)-8b(a-1)(a-2)
=2b(a-2)[a-4(a-1)]
=2b(a-2)[a-4a+4]
=2b(a-2)(-3a+4)
=2b(a-2)(4-3a)
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