If a matrix `A` is such that `3A^3 +2A^2+5A+I= 0`, then `A^(-1)` is equal to
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We have given the matrix `A` such that `3A^3 +2A^2+5A+I= 0`
Then we have to find `A^(-1)`
Then as
`3A^3 +2A^2+5A+I= 0`
`3A^3 +2A^2+5A`+`A``A^(-1)= 0`
`A^(-1)=-3A^2-2A-5`
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