Solve: x² + 6x + 9 = 0 A x = −3 (double root) B x = 3 (double root) C x = −3 and x = 3 D No real solutions ✓ Correct Answer: Option A x² + 6x + 9 = (x + 3)² = 0 → x = −3 (a repeated root). Practice SAT Exam Prep Quizzes → Browse All Questions Study Flashcards