Which statement is true?

a. all rectangles are quadrilaterals
b. all quadrilaterals are rectangles.
c. all quadrilaterals are parallelograms.
d. all quadrilaterals are squares.

To diagonalize an nxn matrix a means to find an invertible matrix p and a diagonal matrix d such that a pdp d p ap or [1 3 dh epap 3 let a=-3 -5 -3 3 3 1 step 1: find the eigenvalues of matrix a "2's" step 2: find the corresponding eigenvectors of a step 3: createp from eigenvectors in step 2 step 4 create d with matching eigenvalues.