Let y′′+3y′−18y=0. Try a solution of the form y=erx, for some unknown constant r, by substituting it into the differential equation. =0. help (formulas) Simplify and factor your equation in the previous part as much as possible. Be sure to divide out any factors guaranteed to be nonzero. =0. help (formulas) Find all values of r such that y=erx satisfies the differential equation. If there is more than one correct answer, enter your answers as a comma separated list.

aloha~! my name is zalgo and i am here to you out on this amazing day. to answer your question, yes, nonzero numbers can have a greatest common factor and that would be 1. still don't get it? let me considering every number is divisible by 1 and hence every number has 1 as a factor of theirs. so, if 2 nonzero numbers didn't share any gcf (greatest common factor), they would still have a factor in common and that would be 1.

i hope that this ! : p

"stay and stay proud! " - zalgo

(by the way, do you mind marking me as brainliest? i'd greatly appreciate it! mahalo! x3)

your answer is  

a.

5

step-by-step explanation: