Question

what is the distance from (-7,4) to (-9,2)?

Answer 1

distance=
\[\sqrt{(-7+9)^2+(4-2)^2}\]

Answer 2

sum of the square of the differnce between x and y coordinates of the points

Answer 3

do the square and the square root cancel each other out?

Answer 4

no no

Answer 5

inside the sqrt there r two terms adding up

Answer 6

simplify those first

Answer 7

sqrt(4+4)=sqrt(8) =2sqrt(2)

Answer 8

Right, remember you can't cancel two squares that are added together with a square root; only if they're multiplied together :)

Answer 9

The answer is \[2\sqrt{2} ?\]