The given coordinates and
.
(Distance formula)
(Substitute
)
(Take the square of the each side)
(Cancel square and root)
(Product of two same signs is positive)
(Add:
)
(Evaluate powers
)
(Formula
)
(Commutative property of addition:
)
(Add:
)
(Subtract 100 from each side)
(Apply additive inverse property:
)
(Subtract:
)
(Rewrite
)
(Distributive property)
(Distributive property)
(or)
(Zero product property)
(or)
The value is .