xy+yx=6 হলে ,x2y2 +y2x2 এর মান কত?
A
30
B
32
C
34
D
36
Correct Answer: 34
{(x/y) + (y + x)}² = 6² = > (x²/y²) + 2.(x/y).(y/x) + (y²/x²) = 6² = > (x²/y²) + (y²/x²) = 36 - 2 = 34