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To simplify \(\sqrt{28}\):
1. First, factor 28 into its prime factors:
\[
28 = 4 \times 7
\]
2. Now, apply the property of square roots:
\[
\sqrt{28} = \sqrt{4 \times 7} = \sqrt{4} \times \sqrt{7}
\]
3. We know that \(\sqrt{4} = 2\), so:
\[
\sqrt{28} = 2 \times \sqrt{7}
\]
Thus, the simplified form of \(\sqrt{28}\) is:
\[
2\sqrt{7}
\]
This matches the response "2 start root 7 end root".