Problema cu 4 matrici
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Laurentiu Tucaa
- Thales
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Problema cu 4 matrici
Fie \( A,B,C,X \in M_n(\mathbb{R}) \) care comuta doua cate doua si \( AX^2+BX+C=0_n \). Sa se demonstreze ca \( \det(B^2-4AC)\ge 0 \).
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Beniamin Bogosel
- Co-admin
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\( (2AX+B)^2=B^2-4AC \). 
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Tomorow is a mistery,
But today is a gift.
That's why it's called present.
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