 Discriminant
2 years ago
fhsmathteacher
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Practice 12 QuestionsShow answers
• Question 1
60 seconds
Q. The discriminant is
aX2  + bX  +  c
b - 4ac
b2 - 4ac
b2 + 4ac
• Question 2
60 seconds Q. ____________
For the function above, is the discriminant positive, negative, or zero?
Positive
Negative
Zero
Not Sure
• Question 3
60 seconds Q. ____________
For the function above, is the discriminant positive, negative, or zero?
Positive
Negative
Zero
Not Sure
• Question 4
180 seconds
Q.

For the function below, is the discriminant positive, negative, or zero?

___________

y = x² + 4x + 4

Positive

Negative

Zero

Not Sure

• Question 5
180 seconds
Q.

What is the discriminant of -2x2 − x − 1 = 0

76

-7

9

none of these

• Question 6
180 seconds
Q.

What is the discriminant of 6x2 − 2x − 3 = 0

76

29

68

none of these

• Question 7
180 seconds
Q.

What is the discriminant for 5x2 + x − 2 = 0

-39

42

-41

none of these

• Question 8
60 seconds
Q.

If the discriminant is positive, then the solution will be

one real solution

two real solutions

no real solutions

one imaginary solution

• Question 9
60 seconds
Q. A function has a discriminant of 25.
______________
How many solutions does it have?
0
1
2
5
• Question 10
60 seconds
Q. In the equation
y = x2 +5x +7, match each leading coefficient with its correct letter
a=0, b=5, c=7
a=1, b=5, c=7
a=7, b=5, c=1
• Question 11
60 seconds
Q.

Determine the values of

a, b, and c for

4x2 – 8x = 3

a = 4, b = -8, c = 3

a = 4, b =-8, c =-3

a = 4, b = 8, c = 3

a = 4, b = 8, c = -3

• Question 12
300 seconds
Q. Determine the value of the discriminant and name the nature of the roots for the following:
x2 + 7x + 13
Remember:  b2 - 4ac