x²-xy+4y-4y=(x²-xy)+4x-4y)=x(x-y)+4(x-y)=(X-y)(X+4)仿照上述分解因式的方法qingnifenjiead-ac-bc+bd
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![x²-xy+4y-4y=(x²-xy)+4x-4y)=x(x-y)+4(x-y)=(X-y)(X+4)仿照上述分解因式的方法qingnifenjiead-ac-bc+bd](/uploads/image/z/1968092-44-2.jpg?t=x%26%23178%3B-xy%2B4y-4y%3D%28x%26%23178%3B-xy%EF%BC%89%2B4x-4y%EF%BC%89%3Dx%EF%BC%88x-y%EF%BC%89%2B4%EF%BC%88x-y%29%3D%28X-y%29%28X%2B4%29%E4%BB%BF%E7%85%A7%E4%B8%8A%E8%BF%B0%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%E7%9A%84%E6%96%B9%E6%B3%95qingnifenjiead-ac-bc%2Bbd)
x²-xy+4y-4y=(x²-xy)+4x-4y)=x(x-y)+4(x-y)=(X-y)(X+4)仿照上述分解因式的方法qingnifenjiead-ac-bc+bd
x²-xy+4y-4y=(x²-xy)+4x-4y)=x(x-y)+4(x-y)=(X-y)(X+4)仿照上述分解因式的方法qingnifenjiead-ac-bc+bd
x²-xy+4y-4y=(x²-xy)+4x-4y)=x(x-y)+4(x-y)=(X-y)(X+4)仿照上述分解因式的方法qingnifenjiead-ac-bc+bd
ad-ac-bc+bd
=(ad-ac)+(bd-bc)
=a(d-c)+b(d-c)
=(a+b)(d-c)