The midpoint of a line segment is (−3,2). One endpoint of the line segment is (4,−7). What are the coordinates of the other endpoint of the line segment?

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.