यदि समीकरण x2+ax-b=0 का एक मूल 1 है, तो (a-b) का मान क्या है?

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  1. -1
  2. -2
  3. 2
  4. 1

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Option 1 : -1
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दिया गया है: द्विघात समीकरण है: x2 + ax - b = 0

इस समीकरण का एक मूल 1 है।

प्रयुक्त अवधारणा:

एक द्विघात समीकरण के लिए: x2 + px + q = 0 यदि r एक मूल है, तो यह समीकरण को संतुष्ट करता है: r2 + pr + q = 0

दिए गए समीकरण में r = 1 प्रतिस्थापित करने पर: 12 + a(1) - b = 0

गणना:

चरण 1: x2 + ax - b = 0 में r = 1 प्रतिस्थापित करें ⇒ 12 + a(1) - b = 0

चरण 2: समीकरण को सरल करें ⇒ 1 + a - b = 0

चरण 3: a - b ज्ञात करने के लिए पुनर्व्यवस्थित करें

⇒ a - b = -1 निष्कर्ष:

∴ (a - b) का मान -1 है।

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-> The Indian Army has released the Exam Date for Indian Army Havildar SAC (Surveyor Automated Cartographer).

->The Exam will be held on 9th July 2025.

-> Interested candidates had applied online from 13th March to 25th April 2025.

-> Candidates within the age of 25 years having specific education qualifications are eligible to apply for the exam.

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