Question

What is the distance between `(-7,8,4)` and `(-5,1,-6)`?

Answer 1

see below

Explanation:

Use distance,`d=sqrt((x_2-x_1)^2+(y_2-y-1)^2+(z_2-z_1)^2)`

`D=sqrt((-5-(-7))^2+(1-8)^2+(-6-4)^2)`
`D=3sqrt(17)`