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.The function is -7x² + 2x + 2 = 0.
\Compare the equation -7x² + 2x + 2 = 0 with general form of quadratic equation ax² + bx + c = 0.
\a = -7, b = 2 and c = 2.
\Substitute a = -7, b = 2 and c = 2 in the quadratic formula : .
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The option A is correct.