Advanced Math practice question

Answer: 2

The expression under the square root must be at least 0: x − 2 ≥ 0, so x ≥ 2. The least value is 2.

Common wrong answers

If you answered 0

0 makes x − 2 = −2, which has no real square root.

If you answered 3

3 is in the domain, but 2 is smaller and also in it.

If you answered -2

−2 has the wrong sign: x − 2 ≥ 0 gives x ≥ 2.

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