√28 can be simplified by factoring 28 into its prime factors: 2 * 2 * 7. Taking the square root of each factor, we have √(2 * 2 * 7) = √(4 * 7). Simplifying further, we have √(4) * √(7), which equals 2√7. Therefore, the simplest radical form of √28 is 2√7.
