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Be Prepared

7.1

2227

7.2

72

7.3

18a33

7.4

x2+9x+20

7.5

−15 −3

7.6

−54 54

7.8

15p2

7.9

6y2+23y+20

7.10

12x2+8x+9

7.11

144x2

7.12

m28m+16

7.13

p218p+81

7.14

k29

7.15

(y6)(y+4)

7.16

(3t+2)(t+5)

7.17

(6p5)2

7.18

5(x4)(x+4)

7.19

y=35

7.20

a=0

7.21

12x22x

7.22

n(n11)(n+2)

Try It

7.1

16

7.2

2

7.3

6x2

7.4

8y2

7.5

2ab

7.6

3m3n

7.7

5m2

7.8

7x

7.9

6(a+4)

7.10

2(b+7)

7.11

14(x+1)

7.12

12(p+1)

7.13

18(u2)

7.14

30(y2)

7.15

5(x25x+3)

7.16

3(y24y+9)

7.17

2x2(x+6)

7.18

3y2(2y5)

7.19

2x(10x25x+7)

7.20

4y(6y23y5)

7.21

3y2(3x+2x2+7y)

7.22

3p(p22pq+3q3)

7.23

−16(z+4)

7.24

−9(y+3)

7.25

−4b(b4)

7.26

−7a(a3)

7.27

(m+3)(4m7)

7.28

(n4)(8n+5)

7.29

(x+8)(y+3)

7.30

(a+7)(b+8)

7.31

(x5)(x+2)

7.32

(y+4)(y7)

7.33

(x+2)(x+4)

7.34

(y+3)(y+5)

7.35

(q+4)(q+6)

7.36

(t+2)(t+12)

7.37

(x+4)(x+15)

7.38

(v+3)(v+20)

7.39

(u3)(u6)

7.40

(y7)(y9)

7.41

(h2)(h+6)

7.42

(k4)(k+5)

7.43

(x+2)(x6)

7.44

(y+4)(y5)

7.45

(r+5)(r8)

7.46

(s+2)(s5)

7.47

prime

7.48

prime

7.49

(m+3)(m+6)

7.50

(n3)(n4)

7.51

(u+4v)(u+7v)

7.52

(x+6y)(x+7y)

7.53

(ab)(a10b)

7.54

(mn)(m12n)

7.55

prime

7.56

prime

7.57

no method undo using FOIL factor with grouping

7.58

factor using grouping no method undo using FOIL

7.59

4(m+1)(m2)

7.60

5(k+2)(k5)

7.61

3(r1)(r2)

7.62

2(t2)(t3)

7.63

5x(x1)(x+4)

7.64

6y(y2)(y+5)

7.65

(a+1)(2a+3)

7.66

(b+1)(4b+1)

7.67

(2x3)(4x1)

7.68

(2y7)(5y1)

7.69

(a1)(8a+5)

7.70

(2b+3)(3b5)

7.71

(3x+2)(6x5)

7.72

(3y+1)(10y21)

7.73

5n(n4)(3n5)

7.74

8q(q+6)(7q2)

7.75

(x+2)(6x+1)

7.76

(2y+1)(2y+3)

7.77

(4h+5)(5h3)

7.78

(g+4)(6g5)

7.79

(2t+5)(5t3)

7.80

(u+1)(3u+5)

7.81

4(2x3)(2x1)

7.82

3(3w2)(2w3)

7.83

(2x+3)2

7.84

(3y+4)2

7.85

(8y5)2

7.86

(4z9)2

7.87

(7x+6y)2

7.88

(8m+7n)2

7.89

(8r+3s)(2r+3s)

7.90

(3u+4)(3u+25)

7.91

2y(2x3)2

7.92

3q(3p+5)2

7.93

(h9)(h+9)

7.94

(k11)(k+11)

7.95

(m1)(m+1)

7.96

(9y1)(9y+1)

7.97

(14m5n)(14m+5n)

7.98

9(4pq)(4p+q)

7.99

(12x)(12+x)

7.100

(13p)(13+p)

7.101

(a2+b2)(a+b)(ab)

7.102

(x2+4)(x+2)(x2)

7.103

7x(y5)(y+5)

7.104

5b(3a4)(3a+4)

7.105

8(a2+25)

7.106

9(4y2+9)

7.107

(x+3)(x23x+9)

7.108

(y+2)(y22y+4)

7.109

(u5)(u2+5u+25)

7.110

(v7)(v2+7v+49)

7.111

(43x)(16+12x+9x2)

7.112

(32y)(9+6y+4y2)

7.113

(2x3y)(4x2+6xy+9y2)

7.114

125(2mn)(4m2+8mn+n2)

7.115

4(5p+q)(25p25pq+q2)

7.116

2(6c+7d)(36c242cd+49d2)

7.117

3a3(a+6)

7.118

9b5(5b+3)

7.119

(5a6)(2a1)

7.120

(2x3)(4x3)

7.121

x(x2+36)

7.122

3(9y2+16)

7.123

4x(2x3)(2x+3)

7.124

3(3y4)(3y+4)

7.125

(2x+5y)2

7.126

(3m+7n)2

7.127

8(y1)(y+3)

7.128

5(u9)(u+6)

7.129

2(5m+6)(25m230m+36)

7.130

3(3q+4)(9q212q+16)

7.131

4(a2+4)(a2)(a+2)

7.132

7(y2+1)(y1)(y+1)

7.133

6(x+b)(x2c)

7.134

2(4x1)(2x+3y)

7.135

4(p1)(p3)

7.136

3(q2)(2q+1)

7.137

x=3,x=−5

7.138

y=6,y=−9

7.139

m=23,m=12

7.140

p=34,p=34

7.141

u=0,u=15

7.142

w=0,w=32

7.143

x=−1

7.144

v=2

7.145

x=4,x=−3

7.146

b=−2,b=−7

7.147

c=2,c=43

7.148

d=3,d=12

7.149

a=0,a=−1

7.150

b=0,b=13

7.151

p=75,p=75

7.152

x=116,x=116

7.153

m=1,m=32

7.154

k=3,k=−3

7.155

x=0,x=32

7.156

y=0,y=14

7.157

a=52,a=23

7.158

b=−2,b=120

7.159

−15,−16and15,16

7.160

−21,−20and20,21

7.161

5 feet and 6 feet

7.162

12 feet and 15 feet

7.163

5 feet and 12 feet

7.164

24 feet and 25 feet

Section 7.1 Exercises

1.

2

3.

18

5.

10

7.

x

9.

8w2

11.

2pq

13.

6m2n3

15.

2a

17.

5x3

19.

4(x+5)

21.

3(2m+3)

23.

9(q+1)

25.

8(m1)

27.

9(n7)

29.

3(x2+2x3)

31.

2(4p2+2p+1)

33.

8y2(y+2)

35.

5x(x23x+4)

37.

6y2(2x+3x25y)

39.

−2(x+2)

41.

(x+1)(5x+3)

43.

(b2)(3b13)

45.

(y+3)(x+2)

47.

(u+2)(v9)

49.

(b4)(b+5)

51.

(p9)(p+4)

53.

−10(2x+1)

55.

(x2+2)(3x7)

57.

(x+y)(x+5)

59.

w(w6)

61.

Answers will vary.

Section 7.2 Exercises

63.

(x+1)(x+3)

65.

(m+1)(m+11)

67.

(a+4)(a+5)

69.

(p+5)(p+6)

71.

(n+3)(n+16)

73.

(a+5)(a+20)

75.

(x2)(x6)

77.

(y3)(y15)

79.

(x1)(x7)

81.

(p1)(p+6)

83.

(y+1)(y7)

85.

(x4)(x+3)

87.

(a7)(a+4)

89.

(w9)(w+4)

91.

prime

93.

(x4)(x2)

95.

(x12)(x+1)

97.

(p+q)(p+2q)

99.

(r+3s)(r+12s)

101.

(m2n)(m10n)

103.

(x+8y)(x10y)

105.

(m+n)(m65n)

107.

(a+8b)(a3b)

109.

prime

111.

prime

113.

(u6)(u6)

115.

(x+2)(x16)

117.

(r4s)(r16s)

119.

(k+4)(k+30)

121.

prime

123.

(m+8n)(m7n)

125.

(u15v)(u2v)

127.

prime

129.

(x+8)(x7)

131.

Answers may vary

133.

Answers may vary

Section 7.3 Exercises

135.

factor the GCF, binomial Undo FOIL factor by grouping

137.

undo FOIL factor by grouping factor the GCF, binomial

139.

5(x+1)(x+6)

141.

2(z4)(z+3)

143.

7(v1)(v8)

145.

p(p10)(p+2)

147.

3m(m5)(m2)

149.

5x2(x3)(x+5)

151.

(2t+5)(t+1)

153.

(11x+1)(x+3)

155.

(4w1)(w1)

157.

(3p2)(2p5)

159.

(4q+1)(q2)

161.

(4p3)(p+5)

163.

16(x1)(x1)

165.

10q(3q+2)(q+4)

167.

(5n+1)(n+4)

169.

(3z+1)(3z+4)

171.

(2k3)(2k5)

173.

(5s4)(s1)

175.

(3y+5)(2y3)

177.

(2n+3)(n15)

179.

prime

181.

10(6y1)(y+5)

183.

3z(8z+3)(2z5)

185.

8(2s+3)(s+1)

187.

12(4y3)(y+1)

189.

(4y7)(3y2)

191.

(a5)(a+4)

193.

(2n1)(3n+4)

195.

prime

197.

13(z2+3z2)

199.

(x+7)(x4)

201.

3p(p+7)

203.

6(r+2)(r+3)

205.

4(2n+1)(3n+1)

207.

(x+6)(x4)

209.

−16(t6)(t+1)

211.

Answers may vary.

213.

Answers may vary.

Section 7.4 Exercises

215.

(4y+3)2

217.

(6s+7)2

219.

(10x1)2

221.

(5n12)2

223.

(7x2y)2

225.

(5n+4)(5n+1)

227.

(8m1)2

229.

10(k+4)2

231.

3u(5uv)2

233.

(x4)(x+4)

235.

(5v1)(5v+1)

237.

(11x12y)(11x+12y)

239.

(13c6d)(13c+6d)

241.

(27x)(2+7x)

243.

(2z1)(2z+1)(4z2+1)

245.

5(q3)(q+3)

247.

6(4p2+9)

249.

(x+5)(x25x+25)

251.

(z3)(z2+3z+9)

253.

(27t)(4+14t+49t2)

255.

(2y5z)(4y2+10yz+25z2)

257.

7(k+2)(k22k+4)

259.

2(12y)(1+2y+4y2)

261.

(8a5)(8a+5)

263.

3(3q1)(3q+1)

265.

(4x9)2

267.

2(4p2+1)

269.

(52y)(25+10y+4y2)

271.

5(3n+2)2

273.

(2w+15)2

275.

Answers may vary.

277.

Answers may vary.

Section 7.5 Exercises

279.

5x3(2x+7)

281.

(y3)(y+13)

283.

(2n1)(n+7)

285.

a3(a2+9)

287.

(11rs)(11r+s)

289.

8(m2)(m+2)

291.

(5w6)2

293.

(m+7n)2

295.

7(b+3)(b2)

297.

3(x3)(x2+3x+9)

299.

(k2)(k+2)(k2+4)

301.

3(5p+4)(q1)

303.

4(x+3)(x+7)

305.

u2(u+1)(u2u+1)

307.

prime

309.

10(m5)(m+5)(m2+25)

311.

−16(t25) −8(2t+5)(t2)

313.

Answer may vary.

Section 7.6 Exercises

315.

x=3,x=−7

317.

a=10/3,a=7/2

319.

m=0,m=5/12

321.

y=3

323.

x=1/2

325.

x=−3,x=−4

327.

a=−4/5,a=6

329.

m=5/4,m=3

331.

a=−1,a=0

333.

m=12/7,m=−12/7

335.

y=−1,y=6

337.

x=3/2,x=−1

339.

p=0,p=¾

341.

x=3/2

343.

7and8;8and−7

345.

4feet and7feet

347.

6feet and8feet

349.

x=−8,x=3

351.

p=−1,p=−11

353.

m=−2,m=8

355.

a=0,a=−6,a=7

357.

10and11;11and−10

359.

10 feet

361.

Answers may vary.

Review Exercises

363.

6

365.

15

367.

6(4x7)

369.

3m2(5m2+2n)

371.

(a+b)(xy)

373.

(x3)(x+7)

375.

(m2+1)(m+1)

377.

(u+8)(u+9)

379.

(k6)(k10)

381.

(y+7)(y1)

383.

(s4)(s+2)

385.

(x+5y)(x+7y)

387.

(a+7b)(a3b)

389.

Undo FOIL

391.

Factor the GCF

393.

6(x+2)(x+5)

395.

3n2(n8)(n+4)

397.

(x+4)(2x+1)

399.

(3a1)(6a1)

401.

(5p+4)(3p2)

403.

(5s2)(8s+3)

405.

3(x+4)(x3)

407.

5(4y+1)(3y5)

409.

(5x+3)2

411.

(6a7b)2

413.

10(2x+9)2

415.

2y(y4)2

417.

(9r5)(9r+5)

419.

(13m+n)(13mn)

421.

(5p1)(5p+1)

423.

(3+11y)(311y)

425.

5(2x5)(2x+5)

427.

u(7u+3)(7u3)

429.

(a5)(a2+5a+25)

431.

2(m+3)(m23m+9)

433.

4x2(6x+11)

435.

(4n7m)2

437.

(r+6)(5r8)

439.

(n2+9)(n+3)(n3)

441.

5(x3)(x+4)

443.

(m+5)(m25m+25)

445.

a=3,a=−7

447.

m=0m=–6m=52

449.

x=−4,x=−5

451.

p=52,p=8

453.

m=512,m=512

455.

−21and−22;21and22

Practice Test

457.

14(y3)

459.

40a2(2+3a)

461.

(x+7)(x+6)

463.

3a(a6)(a+4)

465.

5(n+3)2

467.

(x8)(y+7)

469.

(3s2)2

471.

(10a)(10+a)

473.

3(x+5y)(x5y)

475.

(a3)(b2)

477.

(4m+1)(2m+5)

479.

y=−11,y=12

481.

b=1,b=−1

483.

n=74,n=−3

485.

12and13;13and−12

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