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To solve for x in the equation x2 - 2x - 2 = 0, use the quadratic equation, that is:
For 0 = ax2 + bx + c, the roots (values of x) are defined as:
x = [-b +/- sqrt(b2 - 4ac) ] / 2a
(If that's hard to understand, Google "quadratic formula").
It works out to x = 2.73, -0.73.
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