resolva os seguintes produtos notáveis:
..................2...3
a) (3xy - 1xy)
.....2........2
...............2.3.3
(9cd + 1cd )
.................3
.....................2..3..3
c) (12mn - 1m n )
..................4
d) (30a-50b) (30c+50b)
.......................2.3
e) (40g +25gh )
Obs: os números em cima, são expoentes, em baixo são fração.
maykdesousar:
mano e tipo assim cara (3/2 xy - 1/2 x ao quadrado y)ao cubo
Soluções para a tarefa
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a)
[ 3 xy - 1 x²y ] ³
----- -----
[ 2 2 ]
[ 3 xy - 1 x²y ]² . [ 3 xy - 1 x²y ]
----- ----- ----- -----
[ 2 2 ] [ 2 2 ]
*******************************************************
9 x²y² - 2. 3 xy . 1 x²y + 1 x⁴y²
---- ---- ----- -----
4 2 2 4
[ 9 x²y² - 3x³y² + 1 x⁴y²] . [ 3 xy - 1 x²y]
----- ----- ----- ----- ------
[ 4 2 4 ] [ 2 2 ]
27x³y³ - 9x⁴y³ - 9x⁴y³ + 3x⁵y³ + 3 x⁵y³ - 1 x⁶y³
---- ----- ---- ----- ---- ----
8 8 4 4 8 8
27 x³y³ - 9x⁴y³ - 2.9x⁴y³ + 2.(3x⁵y³) + 3x⁵y³ - 1 x⁶y³
---- ------------------- ------------------------ -----
8 8 8 8
27 x³y³ - 27x⁴y³ + 9x⁵y³ - 1 x⁶y³
---- ----- ---------- -----
8 8 8 8
*************************************
d)
= (30a - 50b).(30a + 50b)
= (30a)² - (50b)²
= 900a² - 2500b²
*****************************************
b)
(9cd+1/3 c2 d3)ao cubo
[9cd + 1 c²d³] ² . [ 9cd + 1 c²d³ ]
---- -----
[ 3 ] [ 3 ]
³
[81c²d² + 2. 9cd . 1 c²d³ + c⁴d⁶]
----
[ 3 ]
[81c²d² + 6 c³d⁴ + c⁴d⁶] . [ 9cd + 1 c²d³]
-----
[ 3 ]
729c³d⁴ + 27c⁴d⁵ + 54c⁴d⁵ + 2c⁵d⁷ + 9c⁵d⁷ + c⁶d⁹
--------
3
729c³d⁴ + 81c⁴d⁵ + 11c⁵d⁷ + c⁶d⁹
--------
3
*********************************************
c)
(12mn-1/4 m2 n3)ao cubo
[12 mn - 1 m²n³]² . [ 12mn - 1 m²n³]
----- ----
[ 4 ] [ 4 ]
(12mn)² - 2.12mn. 1 m²n³ + 1 m⁴n⁶
--- -----
4 16
[144m²n² - 6m³n⁴ + 1 m⁴n⁶] . [ 12mn - 1 m²n³]
----- -----
[ 16 ] [ 4 ]
= 1728 m³n³ - 36m⁴n⁵ - 72m⁴n⁵ + 3 m⁵n⁷ + 3 m⁵n⁷ - 1 m⁶n⁹
---- ----- -----
2 4 64
2.3 + 3 1
= 1728m³n³ - 108m⁴n⁵ + ----------- m⁵n⁷ - ----- m⁶n⁹
4 64
9 1
= 1728m³n³ - 108 m⁴n⁵ + ---- m⁵ n⁷ - ------ m⁶n⁹
4 64
************************************
e)
= ( 40g+25gh2 ) ao cubo
= (40g + 25gh²)² . (40g + 25gh²)
= (40g)² + 2.40g.25gh² + (25gh²)² . (40g + 25gh²)
= (1600g² + 2000g³h² + 625g²h⁴) . (40g + 25gh²)
= 1600g².40g + 1600g².25gh² + 2000g³h².40g + 2000g³h².25gh² + 625g²h⁴.40g + 625g²h⁴.25gh²
= 64000g³ + 40000g³h² + 80000g⁴h² + 50000g⁴h⁴ + 25000g³h⁴ + 15625g³h⁶
******************************************************************
[ 3 xy - 1 x²y ] ³
----- -----
[ 2 2 ]
[ 3 xy - 1 x²y ]² . [ 3 xy - 1 x²y ]
----- ----- ----- -----
[ 2 2 ] [ 2 2 ]
*******************************************************
9 x²y² - 2. 3 xy . 1 x²y + 1 x⁴y²
---- ---- ----- -----
4 2 2 4
[ 9 x²y² - 3x³y² + 1 x⁴y²] . [ 3 xy - 1 x²y]
----- ----- ----- ----- ------
[ 4 2 4 ] [ 2 2 ]
27x³y³ - 9x⁴y³ - 9x⁴y³ + 3x⁵y³ + 3 x⁵y³ - 1 x⁶y³
---- ----- ---- ----- ---- ----
8 8 4 4 8 8
27 x³y³ - 9x⁴y³ - 2.9x⁴y³ + 2.(3x⁵y³) + 3x⁵y³ - 1 x⁶y³
---- ------------------- ------------------------ -----
8 8 8 8
27 x³y³ - 27x⁴y³ + 9x⁵y³ - 1 x⁶y³
---- ----- ---------- -----
8 8 8 8
*************************************
d)
= (30a - 50b).(30a + 50b)
= (30a)² - (50b)²
= 900a² - 2500b²
*****************************************
b)
(9cd+1/3 c2 d3)ao cubo
[9cd + 1 c²d³] ² . [ 9cd + 1 c²d³ ]
---- -----
[ 3 ] [ 3 ]
³
[81c²d² + 2. 9cd . 1 c²d³ + c⁴d⁶]
----
[ 3 ]
[81c²d² + 6 c³d⁴ + c⁴d⁶] . [ 9cd + 1 c²d³]
-----
[ 3 ]
729c³d⁴ + 27c⁴d⁵ + 54c⁴d⁵ + 2c⁵d⁷ + 9c⁵d⁷ + c⁶d⁹
--------
3
729c³d⁴ + 81c⁴d⁵ + 11c⁵d⁷ + c⁶d⁹
--------
3
*********************************************
c)
(12mn-1/4 m2 n3)ao cubo
[12 mn - 1 m²n³]² . [ 12mn - 1 m²n³]
----- ----
[ 4 ] [ 4 ]
(12mn)² - 2.12mn. 1 m²n³ + 1 m⁴n⁶
--- -----
4 16
[144m²n² - 6m³n⁴ + 1 m⁴n⁶] . [ 12mn - 1 m²n³]
----- -----
[ 16 ] [ 4 ]
= 1728 m³n³ - 36m⁴n⁵ - 72m⁴n⁵ + 3 m⁵n⁷ + 3 m⁵n⁷ - 1 m⁶n⁹
---- ----- -----
2 4 64
2.3 + 3 1
= 1728m³n³ - 108m⁴n⁵ + ----------- m⁵n⁷ - ----- m⁶n⁹
4 64
9 1
= 1728m³n³ - 108 m⁴n⁵ + ---- m⁵ n⁷ - ------ m⁶n⁹
4 64
************************************
e)
= ( 40g+25gh2 ) ao cubo
= (40g + 25gh²)² . (40g + 25gh²)
= (40g)² + 2.40g.25gh² + (25gh²)² . (40g + 25gh²)
= (1600g² + 2000g³h² + 625g²h⁴) . (40g + 25gh²)
= 1600g².40g + 1600g².25gh² + 2000g³h².40g + 2000g³h².25gh² + 625g²h⁴.40g + 625g²h⁴.25gh²
= 64000g³ + 40000g³h² + 80000g⁴h² + 50000g⁴h⁴ + 25000g³h⁴ + 15625g³h⁶
******************************************************************
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