If the root equation (a²-1)x+5|b|-10=0 had inn,(a,b) is a pair of the real number,then the pair of real number (a,b) is ( )

If the root equation (a²-1)x+5|b|-10=0 had inn,(a,b) is a pair of the real number,then the pair of real number (a,b) is ( )
If the root equation (a²-1)x+5|b|-10=0 had inn,(a,b) is a pair of the real number
,then the pair of real number (a,b) is ( )

If the root equation (a²-1)x+5|b|-10=0 had inn,(a,b) is a pair of the real number,then the pair of real number (a,b) is ( )
可能是（±1,±2）,如果X 取任何值都成立的话.