1.

Let A, B be two 3xx3 matrices with entries from real number . Which one of the follwing is true ?

Answer»

`(A+B)^(3)=A^(3) +3A^(2) B+3AB^(2)+B^(3)`
`(AB)^(2)=O IMPLIES AB=O `
`(A+B)(A-B)=A^(2)-B^(2)`
`(A+B) A=BA+A^(2)`

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