If you mean: 4x squared+12x+9 then it is (2x+3)(2x+3)
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4x2 - 12x + 9 = 5; whence, 2x - 3 = ±√5, and 2x = 3 ±√5. Therefore, x = ½ (3 ±√5).
4x2 - 12x + 9 = 4x2 - 6x - 6x + 9 = 2x(2x - 3) - 3(2x - 3) = (2x - 3)(2x - 3) or (2x - 3)2
it means that instead of having (2x-3)2 you write 4x2-12x+9
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No solution. Multiply second equation by 3 and get 12x + 6y = 0 but already stated 12x + 6y = 9...