In the quadratic formula, is called the discriminant. The function has a discriminant value of 8 , and has a discriminant value of -16 . The quadratic graphs, and , are shown below.
Which quadratic functions have imaginary roots?
The expression is equivalent to
Which expression is equivalent to , where is the imaginary unit?
What are the zeros of ?
Which graph has imaginary roots?
(1) (3) (2) (4)
If , and , where is the imaginary unit, then equals
Express in simplest form.
Score 2: The student gave a complete and correct response.
Express in simplest form.
Write in simplest form.
Expressed in simplest form, is
Which representation of a quadratic has imaginary roots? \n \n| | |\n| :---: | ---: |\n| -2.5 | 2 |\n| -2.0 | 0 |\n| -1.5 | -1 |\n| -1.0 | -1 |\n| -0.5 | 0 |\n| 0.0 | 2 |