If $A=\left[\begin{array}{ll}1 & 2 \\ 3 & 5\end{array}\right]$ and $\alpha, \beta \in R$ are such that $\alpha A^2-\beta A=2 I$, then $\alpha^2+\beta=$
- A
-8
- B
16
- C
12
- D
20
✓ Correct answer: B
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NewNcert › mathematics › Matrices And Determinants
If $A=\left[\begin{array}{ll}1 & 2 \\ 3 & 5\end{array}\right]$ and $\alpha, \beta \in R$ are such that $\alpha A^2-\beta A=2 I$, then $\alpha^2+\beta=$
-8
16
12
20
Want the full step-by-step reasoning?
Question ID #183457 · NewNcert