Find the distance d(P1,P2) between the points P1 and P2

P1= (-4,5)
P2= (4,3)

d(P1,P2)= ?

Please show all work. Thank you in advance for all of your help!

.d=sqrt((x2-x1)^2+(y2-y1)^2)
=sqrt(4--4)^2+(3-5)^2)
=sqrt((8)^2+(-2)^2)
=sqrt(64+4)
=sqrt(68)
Which simplyfies to:
2sqrt(17)