How do you simplify #6a + 2a#?

1 Answer
Nov 2, 2015

Answer:

#8a#

Explanation:

A multiplication is just a short way to write a sum, in the sense that

#6a=underbrace(a+a+a+a+a+a)_{6}#, and

#2a=underbrace(a+a)_{2}#.

Now, let's add the two terms:

#6a+2a = underbrace(underbrace(a+a+a+a+a+a)_6+underbrace(a+a)_2)_8#

which means that the total is eight times #a#.