Question

Point b has coordinates (2,1). The x coordinate of point A is -7. The distance between point A and point B is 15 units. What are the possible coordinates of point A?

Answer 1

Answer:

(-7 , -11) or (-7 , 13)

Step-by-step explanation:

15² = (2 - (-7))² + (1 - y)²

225 = 81 + 1 -2y + y²

y² -2y -143 = 0

(y + 11) (y - 13) = 0

y = -11 or y = 13

Answer 2

Answer:

(-7 , -11) or (-7 , 13)

Step-by-step explanation: