Question

(CD+(AC+DA))−(AE+EC)

Answer 1

Объяснение:

Если это вектора, то  действия с ними подчиняются законам математики.

(CD+(AC+DA))−(AE+EC)=

=(CD+(DA+АС))−(AE+EC)=

=( (CD+DA)+АС)−(AE+EC)= ( по првилу треугольника )

=(CA+АС)−(AE+EC)=

=СС-АС=0-АС=-АС

Answer 2

It seems like you've provided a mathematical expression:

scssCopy code
(CD + (AC + DA)) - (AE + EC)

This expression involves addition and subtraction of terms. If you're looking for a specific answer or need assistance with simplifying or solving this expression, please let me know.