
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
Given $A={x|2x^{2}+ax+2=0}$ and $B={x|x^{2}+3x-b=0}$, and $A \cap B = {2}$.
(1) Find the values of $a$ and $b$;
(2) Let the universal set $U=A \cup B$, find $(∁_{U}A) \cup (∁_{U}B)$.

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