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Variable: Late Middle English, via Old French from Latin variabilis, from variare. See 'vary'.
Vary: Middle English: from Old French varier or Latin variare, from varius 'diverse'.
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Is the square root of a variable an irrational number?
That will depend on the value of the unknown variable
What is the root definition for invariably?
Variable, or if you're a purist - vary.
What is a nonpermissable replacement in rational expressions?
Replacing the variable in the denominator by a root of the denominator.
What is a value of the variable that makes an algebraic sentence true?
It is the solution or root of the equation.
What is the difference between a polynomial and radical expression?
A polynomial is an expression of various exponentials of a variable wich may or may nor have coefficients and constants. The coefficients may have a radical, square root, cube root etc, but not the variable. A radical expression is any expression involving square roots, cube roots, etc. These may have the variable inside the radical but do not have to have them. sq root (5) is a radical expression, so is sq root (x) 3x2 + 2x - 9 is a polynomial, so is x + sq root (5)
