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Vilket av uttrycken kan inte faktoriseras? \( x^{2}+2 x y+y^{2} \) \( x^{2}-y^{2} \) \( x^{2}+x y+y^{2} \) \( x^{2}-2 x y+y^{2} \)

Ask by Sullivan Bowen. in Sweden
Jan 23,2025

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Uttrycket som **inte** kan faktoriseras är: \[ x^{2} + x y + y^{2} \]

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Mind Expander

Uttrycket \( x^{2}+x y+y^{2} \) kan inte faktoriseras över de reella talen. Det är en så kallad irreducibel kvadratisk form som inte har några reella rötter, vilket gör det omöjligt att bryta ner det i linjära faktorer. Å andra sidan kan de andra uttrycken faktorisera på sätt som \( x^{2}-y^{2} = (x-y)(x+y) \) och \( x^{2}-2xy+y^{2} = (x-y)^{2} \). De visar hur algebraiska identiteter kan göras till nytta när man bryter ner termer!

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