Question

if a(4,-15) and b(7,-9), find ab

Answer 1

What's the distance?

Answer 2

Distance formula:

=√((7-4)^2+(〖(-9)-(-15)〗^2 ) )
=√((7-4)^2+(-9+15)^2 )
√(〖(3)〗^2+〖(6)〗^2 )
=√(9+36)
=√45
=∛5 or 6.708203933