Not every root is irrational Test 4, 9 and 16 within the root. Compare with 2, 3 and 5. Explain the difference. Explore the controls and explain what changed in your own words. Ative o JavaScript para ver esta figura interativa. For many children the square root of a complex number and many teachers scare children by saying that it is something very complex. However, if we know where this term comes from, it is not something complex. Quite the contrary, it is simple and intuitive. This is information that has been lost over time, that is, we have become a sterile notation. The reader will see that semiotically active notations are those that evolved for the advancement of mathematics. The square root from the perspective of the Latin language (Latin) radix quadratum 4 aequalis 2, which we translate as the side of the square of area 4 is equal to 2.