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Lro
@Lro
December 2019
2
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Determine o valor numérico da expressão
ab²+3b³-2a+ab
Para a=2 b=-1
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camponesa
a b² + 3 b³ - 2 a + a b a = 2 b = - 1
2 . ( - 1 ) ² + 3 . ( - 1 ) ³ - 2 . 2 + 2 . ( - 1 )
2 . 1 + 3 . ( - 1 ) - 4 - 2
2 - 3 - 4 - 2
- 1 - 4 - 2
- 5 - 2
- 7
3 votes
Thanks 3
souacarol
Para descobrir o valor numérico da expressão basta substituir a por 2 e b por -1
ab²+3b³-2a+ab
2.(-1)²+3.(-1)³-2.2+2.(-1)
2.1+(-3)-4-2
2-3-4-2
-7
2 votes
Thanks 3
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2 . ( - 1 ) ² + 3 . ( - 1 ) ³ - 2 . 2 + 2 . ( - 1 )
2 . 1 + 3 . ( - 1 ) - 4 - 2
2 - 3 - 4 - 2
- 1 - 4 - 2
- 5 - 2
- 7
ab²+3b³-2a+ab
2.(-1)²+3.(-1)³-2.2+2.(-1)
2.1+(-3)-4-2
2-3-4-2
-7