On the number axis, the distance from point a to the origin o is equal to 2, and on the left side of the origin, the distance from point B to the origin is equal to 7. Find the distance between two points a and B. if the position of point a remains unchanged and the distance between two points a and B is equal to 9, what is the number represented by point B?

On the number axis, the distance from point a to the origin o is equal to 2, and on the left side of the origin, the distance from point B to the origin is equal to 7. Find the distance between two points a and B. if the position of point a remains unchanged and the distance between two points a and B is equal to 9, what is the number represented by point B?

The distance between point a and origin o is equal to 2, and on the left side of the origin, the number represented by point a is - 2, the distance between point B and origin is equal to 7, the number represented by point B is 7 or - 7, the distance between two points of point a and B is = | 7 - (- 2) | = 9 or | - 7 - (- 2) | = 5; if the position of point a is unchanged, the distance between two points of point a and B is equal to 9, let the number represented by point B be x, | X - (- 2) | = 9, | x + 2 = ± 9, | x = 7 or - 11, That is, the number represented by ACE B is 7 or - 11