Name
Practice
For use with pages 592-5Eg
Factor the trinomial.
1. -x2-3x*28
z. -p2+8p-12
3.
4. 2y'*
s. 3a2-13a*4
6, 5d2-r\d-8
7.
10.
6i,c2
l5y +
7
s.
+ 7c + 2
-2b2
-
5b
+
12
*
-m2
-
nin
-
4a
l2w2+8w-15
-
26n
11. -3r2 -
L7r
- l0
12. -4s2 + 6s *
14. -m2 -
7Om
- 16:0
15. .-p2+Bp-42-O
l0n2
12
4
Solve the equation.
13. -x'+x*20:0
>
C
G
.a
16:
2c2-l1cf5:o
17.2y2+y-10:0
18.
1612
-t
18r
* 5:
0
E
o
':
C.)
.=
.
C
'o=
E
I
=
o
C
'a
'=
E
o
o
19.
3w2
+
19w
* 6:0
l2nz
-
17n
* 2:
O
21. l5a2-Za-8:O
!
,=
o
=
o
cf
o
!>
@
t
'-o
22. -2* -
9x
- 4:0
2J5.
-3s2-s*10:0
24.
8d2
-6d-5:0
e
o
(-)
Algebra I
Chapter
I
Practice Workbook.
143
j
Name
D
PfaCtiCg
:-
1t
.
:
ate
continued
For use with pages 592-5gg
Find the zeros of the polynomial function.
*
2s.
f(x):
-xz
28..
f(x):
-2x2
31,
f(x):
4x2
*
6x -f 27
*
2x
29x
26.
f(xS:6
+45x
- 24
zz. f(x) : -3x2 -
-
*
20
zo-
f(x):
8x2
*
3s.
f(x):
l0x2
*
4
29.
f{x):
3x2
-f
30
32.
f(x):
-2x2
34. Summer Business Your weekly
17x
-
71x
30
+
14x
-t
24
53x
-
2l
5x
-
5
*
revenue R (in dollars) from your tie-dye T:"shirt
business can be modeled by
R:
-2t2-+
87t
+ go
where / represents the number of weeks since the fust week you started selling
T:shirts. How much did you make your first week?
*
c
o
a
E
o
.c
(-)
+
35. Cliff Diving A cliff diver jumps from a ledge 96 feet above the ocean with an initial
upward velocity of 16 feet per second. How long wiLl it take until the diver enters
=Co
so
the water?
=
o
-o
C
36.
Wall
Mirror
You
plar on making a will hanging that contains two
smal1 rnirrors as shown.
a. Write a poil.nomial
that represents the area of the wall hangur-g
.a
:=
E
o
-d
2 in.
L
I
I
2x in.
4 in.
b.
The area of the wall hanging wil1be 480 square inches. Find the
lengh and width of the mirrors you will use.
T
2x in.
_t
144
Algebra I
Chapter 9 Practice Workbook
=G
o
=
ooo
!
o
-'=o
>
o
o
(J
I
I