Question
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4. \( 5 x y-8 x y \) 5. \( \frac{1}{2} x^{2}-\frac{5}{4} x^{2} \) 6. \( x y^{2}+\frac{3}{8} x y^{2} \)

Ask by Carroll Chen. in Colombia
Mar 09,2025

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Answer

4. \( -3xy \) 5. \( -\frac{3}{4}x^{2} \) 6. \( \frac{11}{8}xy^{2} \)

Solution

4. Simplifiquemos \( 5xy - 8xy \): - Identificamos los términos semejantes: ambos contienen \( xy \). - Sumamos los coeficientes: \( 5 - 8 = -3 \). - Por lo tanto, el resultado es: \[ -3xy \] 5. Simplifiquemos \( \frac{1}{2}x^2 - \frac{5}{4}x^2 \): - Identificamos los términos semejantes: ambos contienen \( x^2 \). - Hallamos la diferencia de los coeficientes: \[ \frac{1}{2} - \frac{5}{4}. \] - Convertimos \( \frac{1}{2} \) a cuartos: \( \frac{1}{2} = \frac{2}{4} \), luego: \[ \frac{2}{4} - \frac{5}{4} = -\frac{3}{4}. \] - Por lo tanto, el resultado es: \[ -\frac{3}{4}x^2. \] 6. Simplifiquemos \( xy^2 + \frac{3}{8}xy^2 \): - Identificamos los términos semejantes: ambos tienen \( xy^2 \). - Sumamos los coeficientes: \[ 1 + \frac{3}{8}. \] - Representamos \( 1 \) como \( \frac{8}{8} \), de modo que: \[ \frac{8}{8} + \frac{3}{8} = \frac{11}{8}. \] - Por lo tanto, el resultado es: \[ \frac{11}{8}xy^2. \]

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You can simplify \( 5 x y - 8 x y \) by combining like terms, so you would get \( -3 x y \)! It’s like having five cookies and then losing eight; you end up with three fewer cookies than before. For \( \frac{1}{2} x^{2} - \frac{5}{4} x^{2} \), first find a common denominator, which is 4. It turns into \( \frac{2}{4} x^{2} - \frac{5}{4} x^{2} = -\frac{3}{4} x^{2} \). Think of it as collecting a half pizza and then someone taking away five-fourths—sorry, but it looks like you're in the negative pizza territory!

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