Question

Which of the following sums would be under the radical symbol to find the distance between the points (7, -1) and (-8, -9)?

1^2+8^2?

Answer 1

Distance formula between two points with coordinates (x1, y1) and (x2, y2) is given as
\[\sqrt{(x2-x1)^2+(y2-y1)^2}\]
here (x1, y1)= (7, -1)
and (x2, y2)=(-8, -9)

Answer 2

1^2+10^2??

Answer 3

You are ignoring the negative sign..

Answer 4

\(x_2 = -8\)

\(x_ 1 = 7\)

So:

\(x_2 - x_1 = -8 - (7) = ??\)

Answer 5

ooh 15^2+8^2

Answer 6

yes:)

Answer 7

Great..

Take care of negative signs..