Question 209019
{{{2A-B=2(matrix(2,2,6,-3,1,-2))-(matrix(2,2,-4,-1,2,5))=

(matrix(2,2,"2*6","2*-3","2*1","2*-2"))-(matrix(2,2,-4,-1,2,5))=

(matrix(2,2,12,-6,2,-4))-(matrix(2,2,-4,-1,2,5))=(matrix(2,2,12-(-4),-6-(-1),2-2,-4-5))=(matrix(2,2,12+4,-6+1,0,-9))=(matrix(2,2,16,-5,0,-9))}}}
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The correct choice is (B)

Edwin</pre>