Example 1
Simplify.
- a, b
-

-

- If each variable is nonnegative (not a negative number),
If each variable could be positive or negative (deleting the restriction “If each variable is nonnegative”), then absolute value signs are placed around variables to odd powers.

- e
- If each variable is nonnegative,
- f
- If each variable is nonnegative,
If each variable could be positive or negative, then you would write
- g
- If each variable is nonnegative,
If each variable could be positive or negative, you would write
- h
- If each variable is nonnegative,
If each variable could be positive or negative, you would write
- i
- If each variable is nonnegative,
- j
- If each variable is nonnegative,