Q. 17

If A and B are square matrices of the same order then (A – B)2 =?
A. A2 - 2AB + B2

B. A2–AB - BA + B2

C. A2 - 2BA + B2

D. none of these

Answer :

Since A and B are square matrices of same order.

(A - B)2 = (A- B)(A - B)

= A2 - AB - BA+ B2

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