x＋xy－6y－x＋7y－2 分解因式谢谢了,

分类: 作业答案 • 2023-01-10 09:19:23

问题描述：

答

原式=X^2-4Y^2+XY-2Y^2-X+2Y+5Y-2 =(X+2Y)(X-2Y)+Y(X-2Y)-(X-2Y)+(5Y-2) =(X-2Y)[X+2Y+Y-1+(5Y-2)/(X-2Y)] =(X-2Y)[X+3Y-1+(5Y-2)/(X-2Y)]