To factor the expression \(100x + 1000\) completely, we can first identify the common factor in both terms.
- The expression \(100x + 1000\) can be rewritten as: \[ 100(x + 10) \]
This is because \(100\) is a common factor in both terms.
Now, let's see if \(100(x + 10)\) can be factored further. The expression \(x + 10\) does not have common factors that can be factored out further with \(100\).
So, the complete factorization of the expression is: \[ 100(x + 10) \]
Among the options provided, this matches:
- 100(x + 10) (100 times open paren x plus 10 close paren)
Thus, the correct answer is: 100(x + 10).