Images 4X4 12X2Y 9Y2

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4x4 12x2y 9y2. 4x2+6x+9=0. (X+2)^2=(X-6)^2. X-16_X^2-16. 4x2+52x-2808=0.
4x2+6x+9=0. (X+2)^2=(X-6)^2. X-16_X^2-16. 4x2+52x-2808=0.

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