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If A is a square matrix such that A^(2)=...

If A is a square matrix such that `A^(2)= I`, then
`(A-I)^(3)+(A+I)^(3)-7A` is equal to

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To solve the problem, we need to evaluate the expression \((A - I)^3 + (A + I)^3 - 7A\) given that \(A^2 = I\). ### Step-by-Step Solution: 1. **Use the identity for cubes**: We can use the identities for the cubes of binomials: \[ (x - y)^3 = x^3 - 3x^2y + 3xy^2 - y^3 ...
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