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1 9x 2 0
1 9x 2 0 pictures 5
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1 9x 2 0
9x 2 12x 1 0
9x 2 3x 1 0 quadratic formula
9x 2 6x 1 0 discriminant
9x 2 5x 1 0
2x 1 2 9x 2 0
4x 2 9x 1 0
x 2 9x 1 0
9x 2 3x 1 0
9x 2 6x 1 0
1 9x 2 0