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$2 \times 2 - 9x + 8 = 0 \\ 4 - 9x + 8 = 0 \\ - 9x + 12 = 0 \\ - 9x = 12 \\ x = \frac{ - 12}{ - 9} \: or \: x = \frac{12}{9} \\ x = \frac{4}{3}$

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