Question
\( x^{2} y-x y-8 \), para \( x=-1 \) e \( y=2 \)
Ask by Cook Matthews. in Ecuador
Jan 20,2025
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Answer
El valor de la expresión \( x^{2} y - x y - 8 \) cuando \( x = -1 \) y \( y = 2 \) es \(-4\).
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The Deep Dive
Vamos substituir \( x = -1 \) e \( y = 2 \) na expressão \( x^{2} y - x y - 8 \). Substituindo, temos: \[ (-1)^{2} \cdot 2 - (-1) \cdot 2 - 8 \] Isso se torna: \[ 1 \cdot 2 + 2 - 8 = 2 + 2 - 8 = 4 - 8 = -4 \] Portanto, o resultado da expressão para \( x = -1 \) e \( y = 2 \) é \( -4 \).