因式分解:4+12(x-y)+9(x-y)²过程~~~~~~~~~~~~~~~
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因式分解:4+12(x-y)+9(x-y)²过程~~~~~~~~~~~~~~~因式分解:4+12(x-y)+9(x-y)²过程~~~~~~~~~~~~~~~因式分解:4+12(x-
因式分解:4+12(x-y)+9(x-y)²过程~~~~~~~~~~~~~~~
因式分解:4+12(x-y)+9(x-y)²
过程~~~~~~~~~~~~~~~
因式分解:4+12(x-y)+9(x-y)²过程~~~~~~~~~~~~~~~
4+12(x-y)+9(x-y)²
=9(x-y)²+12(x-y)+4
=[3(x-y)+2]²
=(3x-3y+2)²
把x-y看成个整体。
原式=[3(x-y)+2]²=(3x-3y+2)²
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