బీజగణిత వ్యక్తీకరణ 4x2 - y2 + 6y - 9 ______కి సమానం?

1
(2x + y - 3)(2x - y + 3)
2
(2x - y - 3)(2x - y + 3)
3
(2x + y - 3)2
4
(2x + y + 3)2

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