Easy
1 point
ID: #27514
Question
x + y = 12 এবং x - y = 2 হলে xy এর মান কত?
Options
1
45
Correct Answer
2
30
Correct Answer
3
40
Correct Answer
4
35
Correct Answer
Explanation
4xy = (x+y)² - (x-y)² = 12² - 2² = 144 - 4 = 140. সুতরাং xy = 140/4 = 35. অথবা x=7, y=5, xy=35.
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Type
Single Choice
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