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X2 4 0 solution
X2 4 0 solution pictures 5
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X2 4 0 solution
x2 4x 4 0 solution
x2 5x 4 0 solution
x2 2x 4 0 solution
x2 6x 4 0 solution
x2 3x 4 0 solution
x2 4 0 solution
