Advanced Math practice question

Answer: A. 1

1² = 1, so x = 1 works. (The other solution is x = 0: rearranging gives x(x − 1) = 0.)

Why the other answers are wrong

B. 2

2² = 4, not 2.

C. −1

(−1)² = 1, not −1.

D. 3

3² = 9, not 3.

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