Idempotent Matrix

"Let "A" and "B" are two square idempotent matrices such that (AB+-BA) is a null matrix,then Sum of all possible values of det(A+B)" is"

Let A and b are two square idempotent matrices such that ABpm BA is a null matrix, the value of det (A - B) cann vbe equal

If A,B and A+B are idempotent matrices, then

Show that the characteristics roots of an idempotent matris are either 0 or 1

If A,B,A+I,A+B are idempotent matrices,then AB is equal to BA b.-BA c.I d.O

The number of 2xx2 idempotent matrices with integer entries are (A) 1 (B) 2 (C) 3 (D) oo

Questions on multiplication OF matrices || Standard matrices (Involuntary, Idempotent, Periodic and Nilpotent)