1 files changed, 21 insertions, 0 deletions
diff --git a/1499/CH7/EX7.28/q28.sce b/1499/CH7/EX7.28/q28.sce
new file mode 100644
index 000000000..c9395a24e
--- /dev/null
+++ b/1499/CH7/EX7.28/q28.sce
@@ -0,0 +1,21 @@
+A=[-2 4;2 -1];
+B=[0;1];
+
+[r c]=size(A)
+I=eye(r,c)
+P=cont_mat(A,B);
+disp(P,"Controllability Matrix=")
+d=det(P)
+if d==0
+  printf("matrix is singular, so system is uncontrollable");
+else
+  printf("system is controllable");
+end;
+
+
+p=s*I-A // s*I-A 
+q=s^2+3*s-6;
+r=roots(q)
+
+ //roots lie in rhp
+printf("system is unstable")