calcule o valor numérico das seguintes expressões :
Soluções para a tarefa
Resposta:
a) 3x + 4a >>>>>>>>> x = 2; a = -2
3.2 + 4.(-2)
6 + (-8)
6 - 8
- 2
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b) 2x² - 4x + 2y >>>>>>> x = 1; y = 4
2.1² - 4.1 + 2.4
2.1 - 4.1 + 2.4
2 - 4 + 8
-2 + 8
6
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c) 5b + 8x >>>>>>> b = 2; x = 3
5.2 + 8.3
10 + 24
34
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d) 1c + 2x >>>>>>> c = -3; x = 4
1.(-3) + 2.4
-3 + 8
5
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e) 3a + n/2a + n >>>>> a = -1; n = 4
3.(-1) + 4/ 2.(-1) + 4
-3 + 4 / -2 + 4
1 / 2
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f) 2c + 2p/ 3c + p >>>>> c = 2; p = 3
2.2 + 2.3/ 3.2 + 3
4 + 6 / 6 + 3
10 / 9
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g) 3x + 5y² >>>>>> x = 10; y = 2
3.10 + 5.2²
3.10 + 5.4
30 + 20
50
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h) 5a² . 2b³ >>>>>> a = 2; b = 5
5.2² . 2.5³
5.4 . 2.125
20 . 250
5000
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