The last question is, why is the square root operation called root regardless of its true origin? The explanation should become more evident if we write the equation x = ⁿ√a in a different form: xⁿ = a. x is called a root or radical because it is the hidden base of a. Thus...
We know that the value of the square root of 81 is 9. Now, substitute the value in the above-given expression, we get √81 +9 = 9+9 √81+9 = 18. Hence, the simplified form of √81 +9 is 18. Example 2: Find the value of k, if 2√81 + k = 28. ...