(quando eu colocar (*) significa que é elevado
Efetue as seguintes operações:
a) (y³ +3y² +6y +8) + (y³ -3y² -6y -2)
b) (5x*4 -x² +9) - (2x*4 -x³ +2x² -x)
c) (x² +x +2) - (2 +x +x²)
d) x² + 1/4x +2) - (1/3x² -x +2/5)
Soluções para a tarefa
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a)
(y³ + 3y² + 6y + 8) + (y³ - 3y² - 6y - 2)
y³ + 3y² + 6y + 8 + y³ - 3y² - 6y - 2
= 2y³ + 6
*****************************************************
4 2 4 3 2
b) (5x - x + 9) - (2x - x + 2x - x)
4 2 4 3 2
5x - x + 9 - 2x + x - 2x + x
4 3 2
= 3x + x - 3 x + x + 9
-----------------------------------------------------------------------
c) (x² +x +2) - (2 + x + x²)
x² + x + 2 - 2 - x - x²
x² - x² + x - x + 2 - 2
= 0
------------------------------------------------------------------------
d)
x² + 1 x +2) - (1 x² - x + 2)
4 3 5
x² + 1 x + 2 - 1 x² + x - 2
4 3 5
x² - 1 x² + 1 x + x + 2 - 2
3 4 5
60.x² - 20. 1x² + 15.1x + 60x + 120 - 2.12
60
60x² - 20x² + 15x + 60x + 120 - 24
= 40x² + 75x + 96
____________________________________
mmc: 3,4,5: 60
3,4,5: 2
3,2,5: 2
3,1,5: 3
1,1,5: 5
1,1,1 = 2.2.3.5 = 4.15 = 60
(y³ + 3y² + 6y + 8) + (y³ - 3y² - 6y - 2)
y³ + 3y² + 6y + 8 + y³ - 3y² - 6y - 2
= 2y³ + 6
*****************************************************
4 2 4 3 2
b) (5x - x + 9) - (2x - x + 2x - x)
4 2 4 3 2
5x - x + 9 - 2x + x - 2x + x
4 3 2
= 3x + x - 3 x + x + 9
-----------------------------------------------------------------------
c) (x² +x +2) - (2 + x + x²)
x² + x + 2 - 2 - x - x²
x² - x² + x - x + 2 - 2
= 0
------------------------------------------------------------------------
d)
x² + 1 x +2) - (1 x² - x + 2)
4 3 5
x² + 1 x + 2 - 1 x² + x - 2
4 3 5
x² - 1 x² + 1 x + x + 2 - 2
3 4 5
60.x² - 20. 1x² + 15.1x + 60x + 120 - 2.12
60
60x² - 20x² + 15x + 60x + 120 - 24
= 40x² + 75x + 96
____________________________________
mmc: 3,4,5: 60
3,4,5: 2
3,2,5: 2
3,1,5: 3
1,1,5: 5
1,1,1 = 2.2.3.5 = 4.15 = 60
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