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Q.

If A=abb2−a2−ab then A is

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a

Idempotent

b

Involutory

c

Scalar

d

Nilpotent

answer is C.

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Detailed Solution

A=abb2−a2−ab A2=abb2−a2−ababb2−a2−ab     =a2b2-a2b2a b3-a b3-a3b +a3b -a2b2+a2b2=0000

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