1 经过点(-3,0)
代入方程
(m2-2m-3)x+(2m2+m-1)y+6-2m=0
-3m2+6m+9+6-2m=0
3m2-4m-15=0
(m-3)(3m+5)=0
m=3,-5/3
且m2-2m-3≠0
(m-3)(m+1)≠0
m≠3,-1
∴m=-5/3
2 倾斜角是45° k 斜率=1
k= -(m2-2m-3)/(2m2+m-1)=1
-m2+2m+3=2m2+m-1
3m2-m-4=0
(m+1)(3m-4)=0
m=-1,4/3
1 经过点(-3,0)
代入方程
(m2-2m-3)x+(2m2+m-1)y+6-2m=0
-3m2+6m+9+6-2m=0
3m2-4m-15=0
(m-3)(3m+5)=0
m=3,-5/3
且m2-2m-3≠0
(m-3)(m+1)≠0
m≠3,-1
∴m=-5/3
2 倾斜角是45° k 斜率=1
k= -(m2-2m-3)/(2m2+m-1)=1
-m2+2m+3=2m2+m-1
3m2-m-4=0
(m+1)(3m-4)=0
m=-1,4/3