(x+2)^2-(y-3)^2=(x+y)(x-y) ......(1)x-3y=2 ...... (2)由（1）得：x²+4x+4-y²+6y-9=x²-y²4x+6y=5 ....(3)(2)*2+(3)：2x+4x = 4+56x=9x=3/2代入（2）得：3/2-3y=23-6y=466=-1y=-1/6请按一下采纳哦~O(∩_∩)O谢谢~
