• ← Reals
• → RootSum

Root

WMA link

Root[f, i]

represents the i-th complex root of the polynomial f.

• • Root[#1 ^ 2 - 1&, 1]

• • Root[#1 ^ 2 - 1&, 2]

Roots that can't be represented by radicals:

• • Root[#1 ^ 5 + 2 #1 + 1&, 2]