Solve for b
b\in (-\infty,-12]\cup [12,\infty)
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b^{2}\geq 144
Add 144 to both sides.
b^{2}\geq 12^{2}
Calculate the square root of 144 and get 12. Rewrite 144 as 12^{2}.
|b|\geq 12
Inequality holds for |b|\geq 12.
b\leq -12\text{; }b\geq 12
Rewrite |b|\geq 12 as b\leq -12\text{; }b\geq 12.
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