What are the values of x in the equation x2 – 6x + 9 = 25?

The left side factors as x² − 6x + 9 = (x − 3)². So (x − 3)² = 25, which means x − 3 = 5 or x − 3 = −5. Solving gives x = 8 or x = −2, so the correct choice is “x = −2 or x = 8.”

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