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December 2019
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Determine o valor da expressão algébrica vcs podem me ajudar? 2x³-4x+9, para x= -2
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camponesa
2 x³ - 4 x + 9 x = - 2
2 . ( - 2 ) ³ - 4 . ( - 2 ) + 9
2 . ( - 8 ) + 8 + 9
- 16 + 8 + 9
- 8 + 9
1
1 votes
Thanks 0
julind
Bom a expressão se resolve desta maneira !
2.(-8)-4.(-2)+9
-16-8+9
-24+9= -15
0 votes
Thanks 0
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2 . ( - 2 ) ³ - 4 . ( - 2 ) + 9
2 . ( - 8 ) + 8 + 9
- 16 + 8 + 9
- 8 + 9
1
2.(-8)-4.(-2)+9
-16-8+9
-24+9= -15