Is the matrix Diagonalizable

Hi I have a problem in Diagonalizability concept.

**A= [7 -4 0**

** 5 -5 0**

** 6 -6 3]**

A is 3x3 matrix.

I got eigen values as 3, 3, -1

**Need to find eigen vectors and matrix D, where [D= Q^(-1)AQ]**

**D being the diagonal matrix.**

If there is any easy methodology plz suggest

Need help from eigen vectors onwards.

Thanks in advance.

Is the matrix Diagonalizable

Sorry to say the element in the matrix is not zero. Its 3.

I also updated in my first post.

Also 2nd row first element is 8.

(Bow)