
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
In △ABC, a, b, c are the sides opposite to angles A, B, C respectively. Also, b², c² are the two roots of the quadratic equation in x: x² - (a² + bc)x + m = 0.
(1) Find the value of angle A.
(2) If $a= \sqrt {3}$, find the range of values for 2b - c.

Present the answer in LaTex format: \boxed{Your answer}
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