GEOMETRY HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer:
AB (5 ; -6 )
Step-by-step explanation:
AB ( x of b - x of a ; y of b - y of a)
AB (4 - (-1) ; 1-7)
AB (5 ; -6 )
same for the other one