28
The complex conjugate pair (0.5 - 5.1720*i) and (0.5 + 5.1720*i) where i is the imaginary square root of -1.
The exact coefficients of i are +/- sqrt(26.75)
-29
-79
99
-28.87043 and 1.87043 (to 5 dp)
-21, 27
27
-29
-117
-27
391
-79
99
-28.87043 and 1.87043 (to 5 dp)
-117
-21, 27
-117
You should multiply the numbers, but add the exponents. For example: 92 x 27 = 189