1、设P(x,0),|PA|=|PB|推出 (x+1)²+(0-2)²=(x-2)²+(0-根7)²,解得x=1,则P(1,0)
2、解方程 m²-4m+3=(m-1)(m-3) ,①m=1时,P2(1,2),P1(2,3)则直线为x-1/1--2=y-2/2-3,化简得x-1=y-2,x-y+1=0
字数不够!
1、设P(x,0),|PA|=|PB|推出 (x+1)²+(0-2)²=(x-2)²+(0-根7)²,解得x=1,则P(1,0)
2、解方程 m²-4m+3=(m-1)(m-3) ,①m=1时,P2(1,2),P1(2,3)则直线为x-1/1--2=y-2/2-3,化简得x-1=y-2,x-y+1=0
字数不够!