(1)x^2-4x+3=ax-4a+2
x²-(4+a)x+1+4a=0
△=a²-8a+12>0
解得
2<a<6
(2)x^2-4x+3=-(ax-4a+2)
x²+(a-4)x+5-4a=0
△=a²+8a-4>0解得
4-2√5<a<4+2√5
由(1)(2)可得2<a<6
(1)x^2-4x+3=ax-4a+2
x²-(4+a)x+1+4a=0
△=a²-8a+12>0
解得
2<a<6
(2)x^2-4x+3=-(ax-4a+2)
x²+(a-4)x+5-4a=0
△=a²+8a-4>0解得
4-2√5<a<4+2√5
由(1)(2)可得2<a<6