alleryMultiplying [[2,-1],[3,4]] on the right by [[1,0],[0,1]] gives
A[[2,-1],[3,4]]
B[[4,-2],[6,8]]
C[[1,0],[0,1]]
D[[-2,1],[-3,-4]]
Answer & Solution
Correct answer: A. [[2,-1],[3,4]]
Multiplication by the identity matrix leaves A unchanged.
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