किस भुजा वाले वर्ग का क्षेत्रफल मॉडल \(x^2+18x+81\) देगा?
A square with which side will give the area model \(x^2+18x+81\)?
Explanation opens after your attempt
Correct Answer
A. (x+9)correct side
Concept
Since \(81=9^2\) and \(2\cdot x\cdot9=18x\), the side is (x+9). In exams take the square root of the constant square.
Why this answer is correct
The correct answer is A. (x+9) / correct side. Since \(81=9^2\) and \(2\cdot x\cdot9=18x\), the side is (x+9). In exams take the square root of the constant square.
Exam Tip
\(81=9^2\) और \(2\cdot x\cdot9=18x\), इसलिए भुजा (x+9) है। परीक्षा में स्थिर वर्ग का वर्गमूल लें।
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