What is the solution set for x^2+6x+9=0 ? -6 -3 6 9

To solve the quadratic equation , we can use factoring, completing the square, or the quadratic formula. In this case, the equation can be factored easily.First, we recognize that the quadratic can be written as a perfect square trinomial: So, the equation becomes: To solve for , we take the square root of both sides: Solving for : Therefore, the solution set is: So, the correct answer is: