把9(x-y)2+12(x2-y2)+4(x+y)2因式分解得

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/09 04:54:51
把9(x-y)2+12(x2-y2)+4(x+y)2因式分解得把9(x-y)2+12(x2-y2)+4(x+y)2因式分解得把9(x-y)2+12(x2-y2)+4(x+y)2因式分解得9(x-y)&

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

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