Mechanical Engineering > GATE 2014 Set-4 > Linear Algebra
Which one of the following equations is a correct identity for arbitrary 3×3 real matrices P, Q and R?
A
P(Q+R)=PQ+RP
B
(P-Q)2=P2-2PQ+Q2
C
det(P+Q)=det P+det Q
D
(P+Q)2=P2+PQ+QP+Q2

Correct : d

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