The real numbers c, b, a form an arithmetic sequence with a \geq b \geq c \geq 0. The quadratic a x^{2}+b x+c has exactly one root. What is this root?
Answer Choices
A. -7-4 \sqrt{3}
B. -2-\sqrt{3}
C. -1
D. -2+\sqrt{3}
E. -7+4 \sqrt{3}
The real numbers c, b, a form an arithmetic sequence with a \geq b \geq c \geq 0. The quadratic a x^{2}+b x+c has exactly one root. What is this root?
Answer Choices
A. -7-4 \sqrt{3}
B. -2-\sqrt{3}
C. -1
D. -2+\sqrt{3}
E. -7+4 \sqrt{3}