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# What is the number called under the square root when the number is negative in the quadratic equation?

Updated: 10/18/2022

Wiki User

13y ago

The term inside the square root symbol is called the radicand. There isn't a specific term for it based on its sign; whether it's positive or negative, it's still the radicand.

If the radicand is negative, the root is an imaginary number, though that doesn't specifically have anything to do with the quadratic equation in particular.

If the quantity b2 - 4ac is negative in the quadratic equation, the root of the quadratic equation is either complex or imaginary depending on whether or not b is zero.

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Thank you to whoever answered this first; you saved me a bit of trouble explaining this to the asker :)

However, in the quadractic equation, the number under the radical is called the discriminant. This determines the number of solutions of the quadratic. If the radicand is negative, this means that there are no real solutions to the equation.

Wiki User

13y ago

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Q: What is the number called under the square root when the number is negative in the quadratic equation?