\(x^2+bx+25\) पूर्ण वर्ग हो और (b) ऋणात्मक हो, तो (b) क्या होगा?

If \(x^2+bx+25\) is a perfect square and (b) is negative, what is (b)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (-10)

Step 1

Concept

Since \(25=5^2\), for the negative perfect square \(b=-2\cdot5=-10\). Exam tip: read the sign condition carefully.

Step 2

Why this answer is correct

The correct answer is B. (-10). Since \(25=5^2\), for the negative perfect square \(b=-2\cdot5=-10\). Exam tip: read the sign condition carefully.

Step 3

Exam Tip

\(25=5^2\), इसलिए ऋणात्मक पूर्ण वर्ग में \(b=-2\cdot5=-10\) है। परीक्षा में संकेत शर्त जरूर पढ़ें।

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Mathematics Answer, Explanation and Revision Hints

\(x^2+bx+25\) पूर्ण वर्ग हो और (b) ऋणात्मक हो, तो (b) क्या होगा? / If \(x^2+bx+25\) is a perfect square and (b) is negative, what is (b)?

Correct Answer: B. (-10). Explanation: \(25=5^2\), इसलिए ऋणात्मक पूर्ण वर्ग में \(b=-2\cdot5=-10\) है। परीक्षा में संकेत शर्त जरूर पढ़ें। / Since \(25=5^2\), for the negative perfect square \(b=-2\cdot5=-10\). Exam tip: read the sign condition carefully.

Which concept should I revise for this Mathematics MCQ?

Since \(25=5^2\), for the negative perfect square \(b=-2\cdot5=-10\). Exam tip: read the sign condition carefully.

What exam hint can help solve this Mathematics question?

\(25=5^2\), इसलिए ऋणात्मक पूर्ण वर्ग में \(b=-2\cdot5=-10\) है। परीक्षा में संकेत शर्त जरूर पढ़ें।