Question 178698
17) 8 + SR(-20) divided by -4 
[8 + 2isqrt(5)]/-4

= [-2 - (1/2)sqrt(5)]

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128) 6a^2 - 4 = -8 
6a^2 +4 = 0
a^2 = -2/3
a = +-i[sqrt(6)/3]
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129) 3 + SR(-9) = 

= 3 + 3i
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Cheers,
Stan H.