Images 4X4 12X2Y 9Y2

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4x4 12x2y 9y2. -1(X-4)=2(X+1). X^2-2x-4. Sqrt(x+4*sqrt(x-4))+sqrt(x-4*sqrt(x-4)). \Sqrt{5\,x-4}=x.
-1(X-4)=2(X+1). X^2-2x-4. Sqrt(x+4*sqrt(x-4))+sqrt(x-4*sqrt(x-4)). \Sqrt{5\,x-4}=x.

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