જો 9x2 -13xy +4y2 = 0, તો x : y છે:

1
ફક્ત (2 : 3)
2
ફક્ત (4 : 9)
3
(4 : 9) અને (1 : 1)
4
(2 : 3) અને (1 : 1)

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