What is the correct vocab term for the following definition: the expression b^2-4ac found under the root sign in a quadratic formula. it is used to find the number and type of solutions for a quadratic equation. vocab terms: perfect square radical radicand square root completing the square quadratic formula discriminant

The correct answer is:

Discriminant.

Explanation:

The definition of the word "discriminant," regardless of mathematics, is "an agent or characteristic that enables things, people, or classes to be distinguished from one another. "

In mathematics, this is true of the discriminant of a quadratic equation.  The discriminant tells us how many solutions a quadratic equation will have.  This is because we cannot have a real number square root of a negative, the square root of 0 is 0, and the square root of any positive real number will yield two results.  Thus the expression under the square root, b²-4ac, is the discriminant.

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answer: d.) the total number of protons and neutrons is 15

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