If `A` and `B` are square matrices of the same order such that `A B=B A` , then show that `(A+B)^2=A^2+2A B+B^2` .

If `A` and `B` are square matrices of the same order such that `A B=B A` , then show that `(A+B)^2=A^2+2A B+B^2` .
A. `AB = I`
B. `BA=I`
C. `AB=BA`
D. none of these

If `A` and `B` are square matrices of the same order such that `A B=B A` , then show that `(A+B)^2=A^2+2A B+B^2` .

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