Answer:To simplify the expressions (2x + 8y) and (5x + 9y), we can combine like terms.
In the expression (2x + 8y), we have two terms: 2x and 8y. Since these terms do not have any like terms, we cannot combine them further. So, (2x + 8y) is already in its simplest form.
In the expression (5x + 9y), we also have two terms: 5x and 9y. Again, these terms do not have any like terms, so we cannot simplify them further. Therefore, (5x + 9y) is already in its simplest form.
To summarize:
(2x + 8y) is in its simplest form.
(5x + 9y) is also in its simplest form.
Remember, simplifying an expression means combining like terms. If the terms do not have any like terms, then the expression is already in its simplest form.