text: MATRICES If A= T2i in , where i=-1,...
  Question
  
  # MATRICES If A= T2i in , where i=-1, find A + B and A - B. Show that A + B is singular. A - B is singular? Justify your answer. ni 2i7 2-3 21 and B (2 -3 Where i=/-1, find ור
  
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  ( Q quad A=left[begin{array}{cc}i & 2 i -3 & 2end{array}right] quad B=left[begin{array}{cc}2 i & 0 2 & -3end{array}right] quad A+B=left[begin{array}{cc}31 & 31 -1 & -1end{array}right] ) ( A-B=left[begin{array}{cc}-1 & 1 -5 & 5end{array}right] ) ( |A+B|=left|begin{array}{cc}31 & 3 i -1 & -1end{array}right|=begin{array}{cc}-3 i-(-3 i) & 0 =0 & text { hence singular }end{array} ) hence gulay or
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