For any square matrix A with real number entries, A + A' is always a: A. Symmetric matrix B. Skew-symmetric matrix C. Diagonal matrix D. Identity matrix Answer: A) Symmetric matrix Explanation: Let P = A + A'. Then P' = (A + A')' = A' + (A')' = A' + A = P. Since P' = P, A + A' is symmetric.

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For any square matrix A with real number entries, A + A' is always a:

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For any square matrix A with real number entries, A + A' is always a:

Answer: A) Symmetric matrix

Explanation: Let P = A + A'. Then P' = (A + A')' = A' + (A')' = A' + A = P. Since P' = P, A + A' is symmetric.