simplify 8/(sqrt(2))
Let's reduce: 82
The conventional preference is to have numerical square roots in the numerator rather than in the denominator:
ⅰ 82 = 8×22
8×22
ⓘ A fraction is simplified by dividing the numerator and the denominator by the same number: 8×22 = 4×2
▶Simplified form:   4×2
The numeric value of: 4×2 equals:
4×≈ 1.4142
▷ ≈ 5.6569