(4x*2-y*2)除以4x*2-4xy+y*2\2x-y
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![(4x*2-y*2)除以4x*2-4xy+y*2\2x-y](/uploads/image/z/13562770-58-0.jpg?t=%EF%BC%884x%2A2-y%2A2%EF%BC%89%E9%99%A4%E4%BB%A54x%2A2-4xy%2By%2A2%5C2x-y)
(4x*2-y*2)除以4x*2-4xy+y*2\2x-y
(4x*2-y*2)除以4x*2-4xy+y*2\2x-y
(4x*2-y*2)除以4x*2-4xy+y*2\2x-y
(4x*2-y*2)÷(4x*2-4xy+y*2)\(2x-y)
=(2x+y)(2x-y)*(2x-y)/(2x-y)²
=2x+y
2x+y
用到了因式分解(4x*2-y*2)等于2x+y乘以2x-y 4x*2-4xy+y*2\2x-y等于1除以2x-y