Can someone help me out?

15

Step-by-step explanation:

=(−5−4)2+(−4−8)2‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾√

d=(−5−4)2+(−4−8)2

=(−9)2+(−12)2‾‾‾‾‾‾‾‾‾‾‾‾‾‾√

d=(−9)2+(−12)2

=81+144‾‾‾‾‾‾‾‾‾√

d=81+144

=2‾√25

d=225

=15

answer: a

step-by-step explanation:

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb