Question

if A²=A find (I+A)³-7A​

Answer 1

Step-by-step explanation:

A²=A

A²-A=0

A(A-1)=0

A=0 or A=1

if A=0:

(I+A)³-7A​=0

if A=1:

(I+A)³-7A​=(1+1)³-7=2³-7=1