Question Find the following given the matrices. A -8-4 14 5 - 2 3 1 1 wherez and z are unknown values. -3 2-15 -1 I -4-10 4-3 19 -7 and C= 8-1 4 -1 5 1 ] 2 a) Use matrix multiplication to find BA. Show your working. b) What values of x (if any) will make the matrix product BA, found in part (a) equal to an identity matrix? Check your result by substitution (if there is solution). c) Find det C in terms of z by expanding along any column. For what value of z will the matrix C be singular? Show your working.

Following matrices Find 2A+3B 3 AB 3 A-B A+B value I 2 1 2 3 1 B= -1 3 3 A= -1 1 1 5 -2. 5 0 -1.

Use the matrices below to perform the indicated operation if possible. [o 10] C= 7 -10 87 B = -4 2 1 If the operation is undefined, enter NA. Hint: To create a matrix in Mobius, click on the icon that has three rows of three dots - it's next to the infinity symbol. Specify the appropriate number of rows (horizontal) and columns (vertical). ab sin (a) f 00 2C + B =