InterviewSolution
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InterviewSolution
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निम्न बहुपदों के गुणनखण्ड ज्ञात कीजिए। 1. x2 + 6x + 9 – 25y22. 2xy – (x2 + y2 – z2)3. x2 – y2 – 2x + 1 |
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Answer» 1. x2 + 6x + 9 – 25y2 = x2 + 2 × 3 × x + (3)2 – (5y)2 = (x + 3)2 – (5y)2 = (x + 3 + 5y)(x + 3 – 5y) 2. 2xy – (x2 + y2 – z2) = 2xy – x2 – y2 + z2 = z2 – (x2 + y2 – 2xy) = z2 – (x – y)2 = (z + x – y)(z – x + y) 3. x2 – y2 – 2x + 1 = x2 – 2x + 1 – y2 = (x – 1)2 – (y)2 = (x – 1 + y)(x – 1 – y) |
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