The order of the product matrix is

Find the value of x

• 9

• 11

• 13

• None of these

• A

• 2A

• 4A

• 8A

Find UV + XY

• 20

• -20

• [20]

• [-20]

• 4

• 2

• -2

• -4

• I

• A

• O

• None of these

• only AB is defined

• only BA is defined

• AB and BA both are defined

• AB and BA both are not defined

• 3I

• -5I

• 5I

• none of these

    If A and B re two matrices such that AB = B and BA = A then A² + B² is equal to

• 2AB

• 2BA

• A+ B

• AB