1.

If A and B are two square matrices such that `B=-A^(-1)BA,` then `(A+B)^(2)` is eual to-

Answer» Correct Answer - B
Multiply both sides by `A , AB =- BA rArr AB+BA =0`
`(A+B)^(2) A^(2) +B^(2) +AB +BA`
`=A^(2)+B^(2)`


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