Question 356234
{{{x^2-x = -7}}}
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{{{x^2-x + 7 = 0}}}
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{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
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{{{x = (1 +- sqrt( 1-28 ))/(2) }}} 
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{{{x = (1 +- i*sqrt( 27 ))/(2) }}} 
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{{{x = (1 +- 3i*sqrt(3 ))/(2) }}}