यदि \(x^2-18x+c=0\) पूर्ण वर्ग द्विघात समीकरण है, तो (c) का मान क्या होगा?
If \(x^2-18x+c=0\) is a perfect square quadratic equation, what is the value of (c)?
Explanation opens after your attempt
Correct Answer
A. (81)
Concept
For a perfect square, (x-2-18x+c=(x-9)2) is needed. Hence (c=81).
Why this answer is correct
The correct answer is A. (81). For a perfect square, (x-2-18x+c=(x-9)2) is needed. Hence (c=81).
Exam Tip
पूर्ण वर्ग के लिए (x-2-18x+c=(x-9)2) होना चाहिए। इसलिए (c=81) होगा।
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