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Which of the following is true for matro...

Which of the following is true for matrox `A=[{:(,1,-1),(,2,3):}]`

A

`A + 4l` is a symmetric matrix

B

`A^(2)-4A+5l_(2)=0`

C

`A – B` is a diagonal matrix for any value of `alpha` if `B=[(alpha, -1),(2, 5)]`

D

`A – 4l` is a skew symmetric matrix

Text Solution

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The correct Answer is:
B, C
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