1:a=2 b=5
2: a=-2 b=-5
3: a=-2 b=5
4: a为除了2的任意实数 b=-5
5: a=2 b为除了-5的任意实数
6:共四种情况
(1) (0,0)(0,3)(3,0)(3,3)
(2) (0,0)(-3,0)(-3,3)(0,3)
(3) (0,0)(-3,0)(-3,-3)(0,-3)
(4) (0,0)(0,-3)(3,0)(3,-3)
1.a=2,b=5
2.a=-2,b=-5
3.a=-2,b=5
4.b=-5
5.a=2
6.(0,0)(3,0)(3,3)(0,3)
(0,0)(-3,0)(-3,3)(0,3)
(0,0)(-3,0)(-3,-3)(0,-3)
(0,0)(3,-3)(3,0)(0,-3)