Quadratic Functions/Equations
Choose the best answer for each.
Which equation is illustrated by 

x = -3 ±√9 - 4(2)(5)
2x2 - 3x = 5
-3x2 - 5x + 3 = 0
2x2 + 3x - 5 = 0
2x2 + 3x = -5
4
?
Which equation is illustrated by
x = 7 ±√49 - 4(1)(2)
7x2 + x + 2 = 0
x2 - 7x - 2 = 0
x2 - 7x + 2 = 0
x2 + 7x = 2
2
?
Which equation is illustrated by
x = 2 ±√4 - 4(3)(8)
3x2 - 2x = -8
2x2 + 3x + 8 = 0
3x2+ 8x + 3 = 0
6x2 - 2x = 8
6
?
What is the equation of the 
axis of symmetry for 
2x2 - 8x = 0 ?
x = -2
x = 2
-4
x = 4
What is the equation of the 
axis of symmetry for 
x2 + 4 = 0 ?
x = 0
x = -2
x = 4
x = -4
What is the vertex for
(-4, 5)
(2, 0)
(2, 1)
x = 2
x2 - 4x + 5 = 0 ?
What is the vertex for
3x2 - 12x + 1 = 0
(2, -11)
(2, 13)
(-2, 37)
x = 2
What is the vertex for
x2 - 6x = 3 ?
(3, 6)
(3, 0)
(3, -12)
x = 3
Using the discriminant,how many solutions are there for
2
1
0
Cannot be determined
x2 - 6x + 9 = 0 ?
Using the discriminant,how many solutions are there for
2
1
0
Cannot be determined
x2 - 9 = 0 ?
Using the discriminant,how many solutions are there for
2
0
1
Cannot be determined
x2 + 1 = 0 ?
What is
the vertex?
(-2, 9)
(2, -9)
(-1, -9)
(-2, -9)
What are the
solutions?
-4 and 1
-5 and -4
5 and -1
 -5 and 1
Which function
matches the graph?
y = x2 - 1
y = x2 + 2x - 1 
y = 2x2 - 4x - 1
y = x2 - 2x - 1
What number needs to be added to the following
to complete the square?
x2 + 8x + n
8
-8
 16
32
What number needs to be added to the following
to complete the square?
x2 - 10x + n
-25
25
-50
50
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