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Problem 9 - Entrance Test

Solve for x: x^2 + 4x + 4 = 0

Correct: C

To solve the quadratic equation x^2 + 4x + 4 = 0, we notice it is a perfect square trinomial that can be factored as (x + 2)^2 = 0. This means x + 2 = 0. Solving for x gives x = -2.