Question
Download Solution PDFयदि a - b = 3 और a2 + b2 = 29 है, तो ab का मान ज्ञात कीजिए।
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिया गया है:
यदि a - b = 3 और a2 + b2 = 29
प्रयुक्त सूत्र:
(a + b)2 = a2 + b2 + 2ab
(a - b)2 = a2 + b2 - 2ab
गणना:
(a - b) = 3
(a - b)2 = a2 + b2 - 2ab
9 = 29 - 2ab
2ab = 29 - 9
ab = 20/2 = 10
इसलिए, सही उत्तर विकल्प 1 है।
Last updated on Mar 21, 2025
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