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The square root of a number x is a value r such that r² = x. Every positive number has two square roots: a positive (principal) root and a negative root. Only zero has a single square root: zero itself.
Trinn-for-trinn guide
- 1Factor the number into prime factors
- 2Pair up identical prime factors
- 3Take one factor from each pair and multiply them
- 4Any unpaired factors stay inside the radical symbol
Løste eksempler
Inndata
√144
Resultat
12
12 × 12 = 144
Inndata
√2
Resultat
1.41421…
Irrational — cannot be simplified further
Inndata
√0.25
Resultat
0.5
0.5 × 0.5 = 0.25
Inndata
√200
Resultat
10√2
√(100 × 2) = 10√2 ≈ 14.142
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