Practice problem
What is a+b+ca+b+ca+b+c equivalent to?
(−a)+(−b)+(−c)(-a)+(-b)+(-c)(−a)+(−b)+(−c)
c+a+bc+a+bc+a+b
a+b−ca+b-ca+b−c
a−b−ca-b-ca−b−c
Type a concept, like “slope” or “photosynthesis”.
