Quadratic Equation of One Variable

Luo Yan has excellent academic performance and is known as a top student, especially in mathematics. When he and Yang Xuan parted, Yang Xuan gave him a quadratic equation: 4X²+6X+9=0 "Luo Yan, my answer lies in this quadratic equation. You are so smart, I believe you can calculate its result soon." Luo Yan looked at the quadratic equation written on the note and couldn't recover for a long time. As a math student, he had trouble with a familiar equation for the first time... He can't figure it out, not because he doesn't know it, but because he has never thought about it... There is no solution to this question...