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प्रश्न
Factorise:
84 – 2r – 2r2
योग
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उत्तर
84 – 2r – 2r2 = –2(r2 + r – 42)
= –2(r2 + 7r – 6r – 42)
= –2[r(r + 7) – 6(r + 7)]
= –2(r – 6)(r + 7)
= 2(6 – r)(r + 7)
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Factorisation of Polynomials
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 2: Polynomials - Exercise 2.3 [पृष्ठ २१]
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