Cody

# Problem 85. Remove the polynomials that have positive real elements of their roots.

Solution 1750948

Submitted on 14 Mar 2019 by Divya Yerraguntla
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### Test Suite

Test Status Code Input and Output
1   Pass
in = {[1 2 1],[1 -1],[1 1],[1 53 6]}; out_correct = {[1 2 1],[1 1],[1 53 6]}; assert(isequal(find_stable(in),out_correct))

a = -1 -1 k = 1 k = 1 polyOut = 1×1 cell array {1×3 double} a = 1 a = -1 k = 1 polyOut = 1×2 cell array {1×3 double} {1×2 double} a = -52.8865 -0.1135 k = 1 k = 1 polyOut = 1×3 cell array {1×3 double} {1×2 double} {1×3 double}

2   Pass
in = {[1 1],[1 -1]}; out_correct = {[1 1]}; assert(isequal(find_stable(in),out_correct))

a = -1 k = 1 polyOut = 1×1 cell array {1×2 double} a = 1

3   Pass
in = {[1 0 1],[2 -5 2],[2 5 2]}; out_correct = {[1 0 1],[2 5 2]}; assert(isequal(find_stable(in),out_correct))

a = 0.0000 + 1.0000i 0.0000 - 1.0000i k = 1 k = 1 polyOut = 1×1 cell array {1×3 double} a = 2.0000 0.5000 a = -2.0000 -0.5000 k = 1 k = 1 polyOut = 1×2 cell array {1×3 double} {1×3 double}