Q. 365.0( 2 Votes )

If A is a square

Answer :

Expansion of the given expression,

A3 – I3 + 3AI2 – 3A2I + A3 + I3 + 3AI2 + 3A2I – 7A

2A3 – 7A + 6AI2

2A2A – 7A + 6A

2AI – A {A2 = I}

2A – A


Option (A) is the answer.

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