correct answer is c how ?
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For A²=A -> A=I
I³=I²=I
-> (I+A)³=(I+I)³=(2I)³=8I³=8I=8A
->(I+A)³ -7A=8A -7A=A.
Hope it helps...
Regards;
Leukonov/Olegion.
sim3613:
option c is correct
well... then i guess i made mistakes...
may ne
may be
i have doubts...
oh ohk
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