Hi

8x^3+8x+5/2x-1

Using synthetic division for x = -1/2

-0.5	8	0	8	5

		-4	2	-5

	8	-4	10	0

(x+.5)(8x^2 - 4x + 10)

        

        

        

One real root x = -.5  and two imaginary .25 ± .25√19 

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