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Factorise (x^3+x^2-x-1) by grouping.(x^3+x^2-x-1) को समूहीकरण से गुणनखंडित करें।
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: ((x+1)^2(x-1))सही रूप
The grouping gives (x^2(x+1)-1(x+1)), then (x^2-1) also factors. In exams check again after partial factorisation.समूह (x^2(x+1)-1(x+1)) बनता है, फिर (x^2-1) भी टूटता है। परीक्षा में आंशिक गुणनखंड के बाद फिर जांचें।
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