5. Describe to Mr. Dr. Prof. Meso how to input this matrix into mathway, and use mathway to reduce it. Write the reduced matrix here, and then reconvert the matrix into linear equations

-5 If A = -2 3 and B -4 then -6 -4 2 44 -66 AB : help (matrices) -40 60 and 88 ВА — help (matrices) Choose v True or False: AB = BA for any two square matrices A and B of the same size.

Why did you write the number of columns of A as 3 when the matrix has only 2 columns?

Find the LU factorization of -3 A = -15 -6 such that the main diagonal of \left[ -4 3 -21 16 -10 10 100 510 2 21 \right]$ has all ones and use it to solve the system -3 -4 3 x1 -15 18- X2 = -6 -10 10 X3 00 00 000 000 4-8 -21 16 A = LU = -19 -97 -38