作业帮 > 数学 > 作业

9(x-y)²-12(y²-x²)+4(x+y)²

来源：学生作业帮 编辑：大师作文网作业帮 分类：数学作业 时间：2024/11/16 17:25:23
9(x-y)²-12(y²-x²)+4(x+y)²
9(x-y)²-12(y²-x²)+4(x+y)²
9(x-y)²-12(y²-x²)+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.
计算 [12(x+y)³(y-x)]³÷[4(x+y)²（x-y)]² (x-y)³+9(x-y)-6(x-y)² (2x-y)²-4(x-y)(x+2y) 化简：（2x-y)²-4(x-y)(x+y) (x+y)²+4(x+y)-5 因式分解:x²(x-y)+(y-x) 2.(x+y)²(x-y)²-(x-y)(x+y）(x²+y²) 计算：(x+y)²-4(x+y)(x-y)+4(x-y)² 化简 3(X-Y)²-4(X-Y)+7(X-Y)-6(X-Y)² （x-2y）²+（2x-4y)(x+y)+(x+y)² 因式分解：(x-y)(3x-7y)²-4(x-y)(x+y)² (x-y)³(x-y)²(y-x)等于多少