18 + √8 = 18 + √(2 * 4) = 18 + √2 * √4 = 18 + 2√2
√2 ≈ 1,4142135
2√2 ≈ 2,82843
18 + 2√2 = 18 + 2,82843 ≈ 20,82813
18 + √8 = 18 + √(2 * 4) = 18 + √2 * √4 = 18 + 2√2
√2 ≈ 1,4142135
2√2 ≈ 2,82843
18 + 2√2 = 18 + 2,82843 ≈ 20,82813