13.1.5: Chapter 5
( \newcommand{\kernel}{\mathrm{null}\,}\)
Be Prepared
11x2+8x+6
3n+9
−200
−8
x3y
−10.946
2x+6
ⓐ 81; ⓑ 81; ⓒ −81
21
3+xd
6y2
11a2+7a+5
Try It
ⓐ monomial, 0
ⓑ polynomial, 3 ⓒ trinomial, 4
ⓓ binomial, 2 ⓔ monomial, 10
ⓐbinomial, 3 ⓑ trinomial, 3 ⓒ monomial, 0 ⓓ polynomial, 4 ⓔ monomial, 7
ⓐ 21q2 ⓑ 13mn3
ⓐ −7c2 ⓑ −10y2z3
ⓐ 5y2+3z2
ⓑ m2n2−8m2+4n2
ⓐ −4m2+n2
ⓑ pq2−6p−5q2
8x2−11x+8
17y2+14y+1
x2+3x−5
6b2+3
−5ab+7b2
7mn+4n2
5x2−5xy+5y2
7x2−6xy−2y2
x3-y3
p3−3p2q+q3
ⓐ 18 ⓑ 50 ⓒ −15
ⓐ 20 ⓑ 2 ⓒ −4
The height is 150 feet.
The height is 31 feet.
ⓐ (f+g)(x)=3x2−6x−3 ⓑ (f+g)(3)=6
ⓒ (f−g)(x)=x2−2x+9
ⓓ (f−g)(−2)=17
ⓐ (f+g)(x)=6x2−x+7 ⓑ (f+g)(3)=58
ⓒ (f−g)(x)=4x2−7x−9
ⓓ (f−g)(−2)=21
ⓐ b17 ⓑ 43x ⓒ 12p6
ⓓ x18
ⓐ x16 ⓑ 10x+1 ⓐ 12z8
ⓓ b19
ⓐ x5 ⓑ 69 ⓒ 1x4
ⓓ 11215
ⓐ y6 ⓑ 108 ⓒ 1m8
ⓓ 1911
ⓐ 1 ⓑ 1
ⓐ 1 ⓑ 1
ⓐ 1z3 ⓑ 1107 ⓒ p8 ⓓ 64
ⓐ 1n2 ⓑ 110,000 ⓒ q7
ⓓ 16
ⓐ 8116 ⓑ n2m2
ⓐ 12527 ⓑ b4a4
ⓐ 1z9 ⓑ 1p3q3 ⓒ −12v5u
ⓐ 1c15 ⓑ 1r2s8 ⓒ 30d3c8
ⓐ b35 ⓑ 512 ⓒ a48
ⓐ z54 ⓑ 349 ⓒ q29
ⓐ 32w5x5 ⓑ 1 ⓒ 116b12
ⓓ 64a8
ⓐ −27y3 ⓑ 1 ⓒ 116x8
ⓓ 8c12
ⓐ p410000 ⓑ n7m7
ⓒ 81a4b12c8 ⓓ 27x6y9
ⓐ −8q3 ⓑ x4w4 ⓒ x2y69z4
ⓓ 8n6m6
ⓐ 81c24d30 ⓑ 1a18
ⓒ y15
ⓐ 256a22b24 ⓑ 1p39
ⓒ 2x3y10
ⓐ 9.6×104 ⓑ 7.8×10−3
ⓐ 4.83×104
ⓑ 1.29×10−2
ⓐ 1,300 ⓑ −0.00012
ⓐ −950,000 ⓑ 0.075
ⓐ −0.006 ⓑ 20,000
ⓐ −0.009 ⓑ 400,000
ⓐ −35y11 ⓑ 6a5b6
ⓐ 54b9 ⓑ 8r11s8
ⓐ−15y3−24y2+21y
ⓑ 12x4y2−20x3y3+12x2y4
ⓐ 8x4−24x3+20x2
ⓑ −18a5b+12a4b2−36a3b3
ⓐx2+17x+72
ⓑ 15c2+14c−8
ⓐ 20x2+51x+27
ⓑ 30y2−3y−6
ⓐ x2−2x−35
ⓑ 15x2+29x−14
ⓐ b2+3b−18
ⓑ 16y2−20y−50
ⓐx3−8x2+6x−48
ⓑ 8a2b2+12ab−20
ⓐy3−9y2+7y−63
ⓑ 8x2y2+2xy−15
15m2−51m+42
42b2−53b+15
ⓐ y3−8y2+17y−6
ⓑ y3−8y2+17y−6
ⓐ 2x3+5x2−7x+20
ⓑ y3−8y2+17y−6
ⓐx2+18x+81
ⓑ 4c2−4cd+d2
ⓐy2+22y+121
ⓑ 16x2−40xy+25y2
ⓐ 36x2−25
ⓑ16p2−49q2
ⓐ 4x2−49 ⓑ 9x2−y2
ⓐ FOIL; 18b2+77b−18
ⓑ Binomial Squares; 81p2−72p+16
ⓒ Binomial Squares; 49y2+14y+1
ⓓ Product of Conjugates; 16r2−9
ⓐ Binomial Squares; 36x2+84x+49 ⓑ Product of Conjugates; 9x2−16 ⓒ FOIL; 10x2−29x+10 ⓓ Binomial Squares; 36n2−12n+1
ⓐ (f·g)(x)=x3−7x2+13x−15
ⓑ (f·g)(2)=−9
ⓐ (f·g)(x)=x3+x2−52x−28
ⓑ (f·g)(2)=−120
−9a5b
−9dc4
4y27x4
58m5n3
−4a+2b
8a5b+6a3b2
y+7
m+5
x3−3x2+2x+1+3x+3
x3−3x2−2x−1−3x+3
x2+4x+16
25x2+10x+4
3x2+4x−2;2
4x2−3x+1;1
x3−4x2+5;0
x3−3x2+2;0
ⓐ (fg)(x)=x−8
ⓑ (fg)(−3)=−11
ⓐ (fg)(x)=x−9
ⓑ undefined
−1
6
yes
yes
Section 5.1 Exercises
ⓐ trinomial, 5 ⓑ polynomial, 3 ⓒ binomial, 2 ⓓ monomial, 0
ⓔ binomial, 2
ⓐ binomial, 1ⓑ trinomial, 2
ⓒ polynomial, 3ⓓ trinomial, 5
ⓔ monomial, 0
ⓐ trinomial,2 ⓑ monomial,4 ⓒ binomial,1 ⓓ polynomial,3
ⓔ monomial,0
ⓐ binomial,1 ⓑ trinomial,2 ⓒ polynomial,3 ⓓ binomial,3
ⓔ monomial,0
ⓐ 12x2 ⓑ −5a
ⓐ 6w ⓑ 19x2y
12x2−5a
6w+19x2y
ⓐ −22b ⓑ 16xy
ⓐ −10a+5b
ⓑ pq2−4p−3q2
ⓐ −4a2+b2
ⓑ x2y−3x+7xy2
ⓐ xy2−5x−5y2
ⓑ 19y+5z
x−3y+a2b−4a−5ab2
−u2+4v2+12a+8b
−4a−3b
−17x6
11y2+4y+11
−3x2+17x−1
11x2−5x+5
6a2−4a−1
2m2−7m+4
11a+3
12s2−16s+9
3x2−x+4
w2+3w+4
11w−66
10x2−7xy+6y2
10m2+3mn−8n2
−3ab+3b2
p3−6p2q+pq2+4q3
x3+2x2y−5xy2+y3
ⓐ 187 ⓑ 40 ⓒ 2
ⓐ −104 ⓑ 4 ⓒ 40
The height is 11 feet.
The revenue is $10,800.
The cost is $456.
ⓐ (f+g)(x)=7x2+4x+4 ⓑ (f+g)(2)=40
ⓒ (f−g)(x)=−3x2−12x−2
ⓓ (f−g)(−3)=7
ⓐ (f+g)(x)=6x3−x2−9x+3
ⓑ (f+g)(2)=29
ⓒ (f−g)(x)=−x2+5x+3
ⓓ (f−g)(−3)=−21
Answers will vary.
Answers will vary.
Section 5.2 Exercises
ⓐ d9 ⓑ 414x ⓒ 8y4 ⓓ w6
ⓐ n31 ⓑ 3x+6 ⓒ 56w6
ⓓ a16
mx+3
ya+b
ⓐ x15 ⓑ 59 ⓒ 1q18 ⓓ 110
ⓐ p14 ⓑ 412 ⓒ 1b8 ⓓ 145
ⓐ 1 ⓑ 1
ⓐ −1 ⓑ −1
ⓐ 1a2 ⓑ 11000 ⓒ c5 ⓓ 9
ⓐ 1r3 ⓑ 1100,000 ⓒ q10
ⓓ 1,000
ⓐ 6425 ⓑ a2b2
ⓐ 72964 ⓑ −v5u5
ⓐ 125 ⓑ −125 ⓒ 25 ⓓ −25
ⓐ 35 ⓑ 115
ⓐ 1b4 ⓑ w2x9 ⓒ −12cd4
ⓐ 1 ⓑ 1u4v5 ⓒ −36r2s5
1p
ⓐ m8 ⓑ 1018 ⓒ 1x12
ⓐ y3x ⓑ 5xy ⓒ 1q48
ⓐ 9x2y2 ⓑ 1 ⓒ 125x4
ⓓ 16y6
ⓐ −125a3b3 ⓑ 1 ⓒ 136x6 ⓓ 9y8
ⓐ p532 ⓑ y6x6 ⓒ 8x3y6z3
ⓓ 16p6q4
ⓐ a481b4 ⓑ 16m225 ⓒ a4c49b6 ⓓ q8r8p2
ⓐ 1125t8 ⓑ 1t19 ⓒ y43x2
ⓐ 16m8n22 ⓑ 4p6
ⓐ 7n ⓑ 17n ⓒ −17n
ⓐ 19p2 ⓑ 3p2 ⓒ −3p2
x14
a36
8m18
1,000x6y3
16a12b8
827x6y3
1,024a10
25,000p24
x18y18
144m8n22
ⓐ 45x3 ⓑ 48y4
ⓐ 12r4 ⓑ 13x11
1j3
−4000n12
ⓐ 3.4×105 ⓑ 4.1×10−2
ⓐ 1.29×106
ⓑ 1.03×10−6
ⓐ −830 ⓑ 0.038
ⓐ 16,000,000,000
ⓑ 0.00000843
ⓐ 0.02 ⓑ 500,000,000
ⓐ 0.0000056 ⓑ 20,000,000
Answers will vary.
Answers will vary.
Section 5.3 Exercises
ⓐ30x8 ⓑ 15x8y2
ⓐ 72c5 ⓑ 13m5n5
ⓐ −5t3−15t2+90t
ⓑ
ⓐ
ⓑ
ⓐ
ⓑ
ⓐ
ⓑ
ⓐ ⓑ
Answers will vary.
Answers will vary.
Section 5.4 Exercises
ⓐ
ⓑ
ⓐ
ⓑ
ⓐ ⓑ
−6
no
yes
answer will vary
Answers will vary.
Review Exercises
binomial
trinomial
ⓐ 165 ⓑ 39 ⓒ 5
The height is .
ⓐ ⓑ
ⓒ
ⓓ
1
36
1
ⓐ
ⓑ
no
Practice Test
ⓐ trinomial ⓑ 4
yes
ⓐ ⓑ ⓒ
ⓐ
ⓑ