We are going to use the command polyval to determine the value of the polynomial at A= 9. ) First, type help polyval to get Matlab to tell you about

the polyval function. Now, use polyval to evaluate the characteristic polynomial at 9. (Remember Matlab uses 3.4e + 03 for scientific notation 3.4 × 103 = 3400). Write down the result on your paper. Next, use polyval to evaluate the characteristic polynomial at A = 0. Record the result on your paper. Evaluate the determinant of A (use det). What does this tell you about your previous result? Now, evaluate the characteristic polynomial at 0 by calculator on your paper.What do you notice? How can you explain this in light of the previous two steps?