Operazioni con i monomi
Polynomials: Combining "Like Terms"
Eléments du calcul littéral
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Somma algebrica di monomi
1. 4 y
2 5 y
2 15 y
2
2.
3.
4. 7 a 3 b 5 b 12 a 4 b 6 a 5. 4 a 3 b a 2 b 5 a 4 b
6. 10 xy 4 y
2 7 xy 11 xy 3 y
2 y
2 7. 5 x
2y 6 x
2y 9 xy
2 3 x
2y 2 xy
2 8. 6 x
2y 9 xy
2 3 x
2y 5 x
2y 2 xy
2 9 xy
2 9. 2 xy
2 6 x
2y 9 xy
2 3 x
2y 5 x
2y 2 xy
2 9 xy
2
10.
6 19 4 1 6 1 2 7 3 2 1 3
1 x y y x
11.
2 3
2 3
2 3
2 3 5
3 2 15
7 3
5 2 5
1 x y x y x y x y x y
12. 3 x 7 a 2 x 5 a 8 a
(*)13. 8 a b
2 3 ab b
2 10 ab 5 ab 8 a b2 5 b
2 10 ab 3 a b
2 8 ab 3 b
2 3 a b2
14. ( ) ( ) ( ) 15. 2 a
2 5 a 3 b 3 b 2 a
2 5 a 6
16.
cx bx ax bx cx bx cx ax
7 4 3 1 10
1 6
1 5 2 7 3 2
1 6 1
17. y
2 3 x
2 5 xy 2 x
3 10 xy 3 y
2 2 x3 5 xy 10 x
3 4 y2 10 x
3
10 x
3
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Prodotto, divisione e potenze di monomi
19. a a a 20. a
2 a
2 a
2
21. 12 x
4y 6 x
2
22. 18 x
6y
4z 6 x
6y
2z
23.
3 27 4 4
3 x y xy
24.
x y z xy 4 9 4
3
3 225.
x y z xy 4 9 4
3
3 226.
x
2y
4z xy
2z 7 15 5
21
27.
x
2y
4z xy
2z 5 14 5
21
28. ( ) ( ) 29. (
) ( )
30. 5 a
3b
2: 2 ab
31. 6 a
5b
3c 3 ab
4c
3
32.
2 3 3 3 2 22
: 3 2
1 ab c ab c (*)
(*) gentile concessione di stringher.blog.kataweb.it/ - Commissione e-learning IPSSCART B. Stringher - Udine
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Esercizi riassuntivi
33. x
3y
2 7 x
3y
2 3 x
3y
2 5 x2y 2 x
2y
34.
2 4 2 3 2 7 4 2 32 6
2 : 5 3 2
2 4
1 2
1 2
1 a b ab a b a b a b a b
35.
2 3 2 3 2 45 2 8
5 9
10 4
3 a bc abc a c b c
36. 12 x
3y
2: 4 xy
2 2 xy 3 xy3 15 x2y : 3 y 6 x
2y
4 (*)
y : 3 y 6 x
2y
4 (*)
37.
3 3 2 2 2 24
2 :
3 : 1 3
4 3
: 2
2 x x x y xy xy xy (*)
38.
2 6 4 2 4 42 5 2 2 3
2 3 2
3 : 1 3
4 2
: 1 2
1 a b c a ab c a bc m a c m
ab (*)
39.
1 3
1 3
1 3
1 3
1 3
2 3 4 6
2 3 4 2 3
2 3 4 2
2 3 4 3 2
4 6 8
x y z x y z x y z x y z x y z
40.
2 5 3 3 2 2 3 2 64 : 3 4 :
: 3 4
3 xy x y x y xy
41. { [ ( ) ( )]}
(*) gentile concessione di stringher.blog.kataweb.it/ - Commissione e-learning IPSSCART B. Stringher - Udine
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Soluzioni esercizi di somma algebrica di monomi
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b 2 a 3
b - 2b a 2 a 1
b - a 2b 2 a 1
(1/2)a + 2b + a – b =
(1/2)a + 2b + a – b = (1/2)a + a + 2b – b =
= (3/2)a + b
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b b a b a
a 3 5 12 4 6
7
b a
b b a a
b b b a a a
6
4 2 6 5
4 5 3 6 12 7
7a – 3b + 5b -12a + 4b + 6a =
=7a – 3b + 5b - 12a + 4b + 6a =
=7a - 12a + 6a – 3b + 5b + 4b =
= (7-12+6)a + (–3+5+4)b =
= a + 6b =
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b
b b a a
b b b a a a
b a b a b a
3
2 5
5
2 3 4 5 4
4 5 2 3
4
-4a + 3b – a – 2b + 5a – 4b =
= -4a + 3b - a - 2b + 5a -4b =
= -4a - a + 5a - 2b -4b + 3b =
= (-4-1+5)a + (-2-4+3)b =
= -3b
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xy
y y xy xy
y y y xy xy xy
y y xy xy y
xy
6
4 4 11 17
4 3
11 7
10
3 11 7
4 10
2 2
2 2 2
2 2 2
-10xy+4y 2 -7xy+11xy-3y 2 -y 2 =
= -10xy+4y 2 -7xy+11xy-3y 2 -y 2 =
= -10xy-7xy+11xy+4y 2 -3y 2 -y 2 =
= (-10-7+11)xy+(4-3-1)y 2 =
= -6xy
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2 2
2 2
2
2 2 2
2 2
2 2
2 2
2
11 4
11 3
1
9 2 3
6 5
2 3
9 6
5
xy y x
xy y x y
xy xy y x y x y x
xy y x xy y x y x
-5x 2 y+6x 2 y-9xy 2 +3x 2 y-2xy 2 =
= -5x 2 y+6x 2 y-9xy 2 +3x 2 y-2xy 2 =
= -5x 2 y+6x 2 y+3x 2 y-2xy 2 -9xy 2 =
= (-5+6+3) x 2 y +(-2-9)xy 2 =
= 4 x 2 y – 11 xy 2 =
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2 2
2 2
2 2
2 2
2 2
2 2
2 2
2 2
2 2
2 4
9 7
5 9
9 9
2 5
3 6
9 2
5 3
9 6
xy y x
xy xy
y x y x
xy xy
xy y x y x y x
xy xy
y x y x xy y x
6x 2 y-9xy 2 +3x 2 y-5x 2 y-2xy 2 +9xy 2 =
= 6x 2 y-9xy 2 +3x 2 y-5x 2 y-2xy 2 +9xy 2 =
= 6x 2 y+3x 2 y-5x 2 y +9xy 2 -2xy 2 -9xy 2 =
= (6+3-5)x 2 y+(-9-2+9)xy 2 =
= 4 x 2 y – 2 xy 2 =
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y x
xy xy
y x y x y x xy xy
xy xy
xy xy
y x y x xy y x xy
2
2 2
2 2
2 2 2
2 2
2 2
2 2
2 2
2