118k views
2 votes
What is ab+ba?
and xz+zx

ab + ba


1 Answer

2 votes

Answers: 1) " 2ab ".
2) " 2xz ".

________________________

Explanation:

ab + ba = ab + ab = 1ab + 1ab = (1+1)*ab = 2ab .

xz + zx = xz + xz = 1xz + 1xz = (1+1)*xz = 2xz.

________________________

User Ilya Ayzenshtok
by
4.2k points