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यदि a $ b = a² − b² दिया गया है, तो 7 $ 5 किसके बराबर होगा?

A35
B4
C74
D24
Answer & Solution
Correct answer: D. 24
वर्ग करने पर 49 और 25 प्राप्त होता है, और उनका अंतर 49 − 25 = 24 है।
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