- #1

hayze2728

- 4

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## Homework Statement

I have to proove that the determinant of :

x a a . . . a

a x a . . . a

. . .

. . .

a . . . a

a . . . . . x

If you get the idea (it's (n x n) with x's along the diagonal and a's everywhere else)

That it is (x + (n-1)a)(x - a)^(n-1)

I really don't have a clue how to do this so any hints appreciated.