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What is the correct expansion of (x + 10)²?(x + 10)² का सही विस्तार क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: x² + 20x + 100x² + 20x + 100
Using (a + b)² = a² + 2ab + b² with a = x and b = 10 gives (x + 10)² = x² + 20x + 100. The middle term is 2 × x × 10 = 20x, so option A is correct.(a + b)² = a² + 2ab + b² का सूत्र लगाएँ। a = x और b = 10 रखने पर (x + 10)² = x² + 20x + 100 मिलता है। मध्य पद 2 × x × 10 = 20x है, इसलिए विकल्प A सही है।
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