Question

If A and B are square matrices of the same order, then (A + B)(A − B) is equal to 

Options

•  A² − B²

•  A² − BA − AB − B²

• A² − B² + BA − AB

• A² − BA + B² + AB

Answer 1

(A + B)(A − B) = A² − AB + BA − B²  

Hence, the correct option is (c).