
Algebraic Expressions and Identities
Presentation
•
Mathematics
•
8th Grade
•
Hard
Feridun Yüksel
Used 5+ times
FREE Resource
8 Slides • 25 Questions
1
Algebraic Expressions and Identities
1- Algebraic Expressions
2- Identities
3- Factorisation
2
Algebraic Expressions
Expressions containing at least one unknown and involving operations are called algebraic expressions.
Each part of an algebraic expression that is separated by addition or subtraction is called a term of the algebraic expression.
The number at the beginning of a term is called the coefficient of that term.
Unknowns in an algebraic expression are called variables.
Terms that do not contain variables are called constant terms.
3
Multiple Choice
In the algebraic expression 3x2−5x + 6 if the number of terms is A and the constant term is B, what is the result of the operation A+B ?
7
8
9
10
4
NOT:
To find the sum of the coefficients of an algebraic expression, the value of the algebraic expression can be found by substituting 1 for the variable (unknown).
5
Multiple Choice
(x+5).(3x2+4x−3) What is the sum of the coefficients of the algebraic expression?
10
24
30
36
6
Multiple Choice
(x+3).(x−2) işleminin sonucu aşağıdakilerden hangisine eşittir?
x2 +5x −6
x2+5x−6
x2+x+6
x2+x−6
7
Multiple Choice
Yanda verilen şekilde modellenen işlem aşağıdakilerden hangisidir?
(2x+3).(2x+1)
(2x+1)(2x−3)
(x+3)(x+1)
(2x−1)(2x−3)
8
Denklem İle Özdeşlik Farkı
Değişkeninin BAZI değerleri için sağlanan eşitliklere denklem denir.
Değişkenin HER değeri için sağlanan eşitliklere özdeşlik denir. (Bilinmeyen yerine ne yazarsan yaz, eşitlik sağlanır.)
9
Multiple Choice
Aşağıda verilen eşitliklerden hangisi özdeşliktir?
2x+5=15
3x . (x+5)=3x2+15
x2+2x+1 =(x+1)2
(x+5)2=x2+25
10
Multiple Select
Aşağıda verilen eşitliklerden özdeşlik olanları belirleyiniz.
(x+1).(x+2)=x2+3x+2
3.(2x+5)=6x+15
(x+y)2=x2+y2
2x.(3x−1)=6x2−2
11
Multiple Choice
x2+Ax+B =(x−3)2 ifadesi bir özdeşlik ise A+B kaçtır?
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6
9
15
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Tam Kare Özdeşlikler
13
Multiple Choice
x+y=8 ise x2+2xy+y2 ifadesinin değeri kaçtır?
49
64
81
100
14
Multiple Choice
a−b=6 ise a2+2ab+b2 işleminin sonucu kaçtır?
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24
36
48
15
Multiple Choice
a−b=6 a2+b2=90 işleminin sonucu kaçtır?
30
27
24
21
16
Multiple Choice
ax2+60x+36 ifadesi tam kare bir ifade olduğuna göre a kaçtır?
25
20
10
5
17
Multiple Choice
972+6.97+9 ifadesi aşağıdakilerden hangisine eşittir?
62
102
103
104
18
Multiple Choice
482−2.48.39+392 işleminin sonucu kaçtır?
9
39
81
87
19
Multiple Choice
Yanda verilen şekilde modellenen özdeşlik aşağıdakilerden hangisidir?
x2+2x+1
x2+4x+4
x2+6x+9
x2+8x+16
20
İki Kare Farkı Özdeşliği
21
Multiple Choice
x+y=10 ve x−y=7 ise x2−y2 işleminin sonucu kaçtır?
3
17
70
149
22
Multiple Choice
x=5,5 ve y=1,5 ise x2−y2 işleminin sonucu kaçtır?
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24
28
32
23
Multiple Choice
x2−y2=30 ve x−y=5 ise x2+2xy+y2 ifadesinin değeri kaçtır?
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16
25
36
24
Multiple Choice
402−242 işleminin sonucu aşağıdakilerden hangisine eşittir?
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28
29
210
25
Multiple Choice
412=x2+402 ise x kaçtır?
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9
10
11
26
Multiple Choice
97.103 işleminin sonucu aşağıdakilerden hangisine eşittir?
104−9
102−32
102−1
104−1
27
Multiple Choice
Yanda verilen şekilde boyalı bölgenin alanını alanını veren cebirsel ifade aşağıdakilerden hangisidir?
(5+x).(5−x)
(25+x).(25−x)
(5+2x).(5−2x)
(2x+5).(2x−5)
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Çarpanlara Ayırma
1- Ortak Çarpan Parantezine Alma
2- Özdeşliklerden Yararlanarak Çarpanlara Ayırma
29
Ortak Çarpan Parantezine Alarak Çarpanlara Ayırma
30
Multiple Choice
3x4+6x3=(x+2).Δ eşitliğine göre Δ yerine aşağıdakilerden hangisi yazılmalıdır?
3x2
3x
3x4
3x3
31
Multiple Choice
ac+bc=30 ve a+b=5 ise c kaçtır?
4
5
6
10
32
Multiple Choice
9x2−25−12xy+4y2 ifadesinin çarpanlarından biri aşağıdakilerden hangisidir?
3x+2y+5
3x+2y−5
3x−y+5
3x−2y−5
33
Multiple Choice
145.155+25 işleminin sonucu kaçtır?
145
150
155
175
Algebraic Expressions and Identities
1- Algebraic Expressions
2- Identities
3- Factorisation
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