Ex of the distance f?

The distance formula is quite simple. For example,

Find the distance between (3,-1) and (5,0)

d = √(x^2 - x^1) + (y^2 - y^1)
d = √(5^2 - 3^1) + ((-1^2 - 0^2))
d = √(5 - 3^2) + (0 + 1)^2
d = √2^2 + 1^2
d = √5
d ≈ 2.24

The distance between (3,-1) and (5,0) is approximately 2.24 units.

The "≈" is the almost equal to sign.