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Which of the following expressions represents the expansion of \((x+y)^2\)?निम्नलिखित में से कौन-सा व्यंजक \,\((x+y)^2\)\, के विस्तार को दर्शाता है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: \(x^2+2xy+y^2\)\(x^2+2xy+y^2\)
The identity \((x+y)^2=x^2+2xy+y^2\) includes the cross-term \(2xy\) along with both square terms. Option B represents \((x-y)^2\). Exam tip: use the sign of the middle term to identify the identity.पहचान \((x+y)^2=x^2+2xy+y^2\) में दोनों वर्ग पदों के साथ मध्य पद \(2xy\) आता है। विकल्प B, \((x-y)^2\) है। परीक्षा में मध्य पद का चिन्ह देखकर पहचान चुनें।
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