Question 385519
 x^2+9x-12=0
 Use the quadratic formula:
x = [-b +- sqrt(b^2-4ac)]/(2a)
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x = [-9 +- sqrt(81 - 4*1*-12)]/2
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x = [-9 +- sqrt(129)]/2
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x = [-9 +- 11.36]/2
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x = [2.36/2] or x = [-20.36/2]
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x = 1.18 or x = -10.18
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cheers,
Stan H.