Question
Download Solution PDFसरल कीजिए:
This question was previously asked in
UPSSSC PET Official Paper (Held on: 16 October 2022 Shift 2)
Answer (Detailed Solution Below)
Option 1 : 4
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Download Solution PDFदिया गया है:
प्रयुक्त सूत्र:
(a + b)2 - (a - b)2 = 4ab
गणना:
(a + b)2 - (a - b)2
⇒ a2 + b2 + 2ab - {a2 + b2 - 2ab}
⇒ 2ab + 2ab = 4ab
अब,
⇒
∴ सही उत्तर 4 है।
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