x+y = √7 এবং y = x-√3 হলে xy এর মান কত?
A 3
B 4
C 2
D 1
Correct Answer: Option D
x+y = √7
এবং y = x-√3
x - y = √3
xy = (x+y)^2 - (x-y)^2/4
= (√7)^2 - (√3)^2/4 = 7-3/4
xy = 1
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