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December 2019
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Considere a expressão algébrica: x²y - 2xy +4x - y. Calcule seu valor numérico considerando x = 2 e y = - 1.
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LucasDiehl
Basta trocarmos o x e o y na equação:
(2²*-1)-(2*2*-1)+(4*2)-(-1)
(-4)-(-4)+(8)-(-1)
-4+4+8+1
9
A resposta é 9
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(2²*-1)-(2*2*-1)+(4*2)-(-1)
(-4)-(-4)+(8)-(-1)
-4+4+8+1
9
A resposta é 9