9(x-y)²+12(x²-y²)+4(x+y)² 因式分解

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9(x-y)²+12(x²-y²)+4(x+y)²因式分解9(x-y)²+12(x²-y²)+4(x+y)²因式分解9(

9(x-y)²+12(x²-y²)+4(x+y)² 因式分解
9(x-y)²+12(x²-y²)+4(x+y)² 因式分解

9(x-y)²+12(x²-y²)+4(x+y)² 因式分解
9(x-y)²+12(x²-y²)+4(x+y)² =[3(x-y)+2(x+y)]^2 =(5x-y)^2