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If (x+y=5) and (x-y=1), what is the value of (2(x+y)+3(x-y))?यदि (x+y=5) और (x-y=1), तो (2(x+y)+3(x-y)) का मान क्या होगा?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 1313
Given \(x+y=5\) and \(x-y=1\), substitute these values directly: \(2(x+y)+3(x-y)=2\times5+3\times1=10+3=13\). Therefore, 13 is correct. The value 11 does not result from correct substitution. Exam tip: When \(x+y\) and \(x-y\) are given directly, there is no need to find \(x\) and \(y\) separately.दिया है कि \(x+y=5\) तथा \(x-y=1\)। अतः \(2(x+y)+3(x-y)=2\times5+3\times1=10+3=13\)। इसलिए सही उत्तर 13 है। 11 प्राप्त करने के लिए कोई सही प्रतिस्थापन नहीं बनता। परीक्षा टिप: जब \(x+y\) और \(x-y\) सीधे दिए हों, तो पहले \(x\) और \(y\) अलग-अलग निकालने की आवश्यकता नहीं होती।
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