Question 1029212
Solve -16t^2 -8t = 10 by completing the square. 
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16t^2 + 8t = -10
t^2 + (1/2)t = -5/8
c = (b/2a)^2 = (8/32)^2 = 1/16
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t^2 + (1/2)t + 1/16 = -5/8 + 1/16 = -9/16
(t+1/4)^2 = -9/16
t + 1/4 = ± sqrt(-9/16) = ±3i/4
t = -1/4 ± 3i/4
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*[invoke solve_quadratic_equation -16,-8,-10]