Đưa phương trình sau về dạng chính tắc:
(∂^2 z)/〖∂x〗^2 +2 (∂^2 z)/∂x∂y+(∂^2 z)/〖∂y〗^2 =0

1

step-by-step explanation:

it's the only multiple of both and the least

answer: ♡♡♡♡♡♡♡♡♡♡

step-by-step explanation:

from the sentence, "tomorrow morning, akiko will arrive an hour late" depicts a third person perspective because it doesn't use any pronoun to replace akiko, the subject of the sentence, and it is in singular form since akiko is only one person.

“a term can be a signed number, a variable, or a constant multiplied by a + sign or j sign. in , the terms are 5x , 3y and 8. when a term is made up of a constant multiplied by a variable or variables, that constant is called a coefficient.” i hope this you.