The radicand of a simplified radical has no perfect square factors. A perfect square is the product of a number multiplied by itself (squared). To simplify a radical, factor out the perfect squares by recognizing that \(\sqrt{a^2} = a\). For example, \(\sqrt{64} = \sqrt{16 \times 4} = \sqrt{4^2 \times 2^2} = 4 \times 2 = 8\).
Simplify \( \sqrt{28} \)
| 4\( \sqrt{7} \) | |
| 7\( \sqrt{7} \) | |
| 8\( \sqrt{14} \) | |
| 2\( \sqrt{7} \) |