Jabarkan Contona,  saprak . dari Akar kuadrat dalam bahasa sunda

Conto ieu nembongkeun yén akar kuadrat bisa dipaké keur ngaréngsékeun persamaan kuadrat saperti  atawa leuwih ilahar .

Ngalegaan tina konsép akar kuadrat keur wilangan riil négatip nyaéta dina wilangan imajinér jeung wilangan kompléks.

Akar kuadrat mindeng mangrupa wilangan irasional, requiring an infinite, non-repéating series of digits in their decimal representation.  For example,  cannot be written exactly in finite or repéating decimal form.  Equivalently, it cannot be represented by a fraction whose numerator and denominator are integers.  Nonetheless, it is exactly the length of the diagonal of a square with side length 1.  The discovery that  is irrational is attributed to the Pythagoreans.

Lambang akar kuadrat (√) munggaran dipaké dina abad ka-16. Diduga asalna tina bentuk singget pikeun r, tina Basa Latin radix (hartina "akar").