पूर्ण वर्ग बनाते समय \(x^2-18x\) में कौनसा पद जोड़ना होगा?
While completing the square, which term must be added to \(x^2-18x\)?
Explanation opens after your attempt
Correct Answer
A. (81)
Concept
Half of (-18) is (-9), and ((-9)2=81). In exams, the square of half the coefficient is always positive.
Why this answer is correct
The correct answer is A. (81). Half of (-18) is (-9), and ((-9)2=81). In exams, the square of half the coefficient is always positive.
Exam Tip
(-18) का आधा (-9) है और ((-9)2=81) होता है। परीक्षा में आधे गुणांक का वर्ग हमेशा धनात्मक होता है।
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