The domain of the expression x2 + 2x + 1x + 1{“version”:”1.1…
The domain of the expression x2 + 2x + 1x + 1{“version”:”1.1″,”math”:”x2 + 2x + 1x + 1″} includes all real numbers except what number(s)? Enter the answer(s) in the box below. If more than one real number is excluded from the domain, enter a comma-separated list. If the domain is all real numbers, enter NONE.
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