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गुणनखंड कीजिए : 84 – 2r – 2r2 - Mathematics (गणित)

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Question

गुणनखंड कीजिए :

84 – 2r – 2r2

Sum

Solution

84 – 2r – 2r= –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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बहुपदों का गुणनखंडन
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Chapter 2: बहुपद - प्रश्नावली 2.3 [Page 21]

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NCERT Exemplar Mathematics [Hindi] Class 9
Chapter 2 बहुपद
प्रश्नावली 2.3 | Q 23. (iv) | Page 21
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