(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Explain why the formula is not valid for matrices.

(A+B)(A+B)=A^2 + 2AB + B^2

2. Relevant equations

none.

3. The attempt at a solution

I don't know really know how to start this. I don't really know why that is not valid. Please help me understand. Thank you.

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# Homework Help: Linear algebra. Help please.

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