Match the letter of the choice most closely associated with the given term (you will not use all of the choices)

Question

1. discriminant                                          A. -b/(2a)

2. standard form of a quadratic equation     B. y=x² 

3.minimum                                               C. b²-4ac

                                                               D. y= a(x-h)² + k 

                                                               E. x =-b±√b² -4ac

                                                                             2a

Answer 1

1. C

 

The expression under the square root for the quadratic formula in answer E classify the number of real roots of the quadratic equation as either 2, 1, or 0 depending on whether b² - 4ac is positive, 0, or negative, respectively.

 

 

2. D

 

This is the vertex form of the quadratic equation--one of the standard forms.  (h,k) is the location of the vertex.  a tells you whether the parabola is concave up or concave down and the amount of stretch.

 

3. A

 

This expression helps you find the x value of the vertex.  The vertex is either a maximum or minimum depending on the value of a.

 

 

 

 

Answer 2

1. C

2. D

3. A

 

Await an explanation of each. Thanks.