For questions 20 - 21, find the value of
c
that makes the expression a perfect square
trinomial.
Then write the expression as the square of a binomial.
20.
x
2
21.
x
2
For questions 22 - 29, choose the best answer and place the corresponding letter in the
blank.
_____
22.
What is the vertex of the graph of
y
?
A.
3, 4
(
)
B.
3, 4
C.
3,
D.
3,
−
4
(
)

_____
24.
If
b
2
, then the type and number of zeros for the quadratic
equation are which of the following?

_____23.If
ax
2
is a perfect square trinomial, then the graph of
y
has exactly how many x-intercepts?

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_____
25.
Which of the following is equivalent to
i
41
?

_____
26.
What is the conjugate of
4
?
A.
3
B.
3
−
4
i
C.
4
D.
5

_____
27.
Which of the following quadratic equations is in vertex form?

_____
28.
Which of the following is a perfect square trinomial?

_____
29.
In which direction does the parabola
y
open?

30.
Derive the Quadratic Formula from
y
.