question_answer

If \[A=\{x:{{x}^{2}}-3x+2=0\}\]and \[B=\{x:{{x}^{2}}+4x-5=0\}\] then the value of A - B is

A)  \[\{1,2\}\]                         

B)  {2}  

C)  \[\{1\}\]                             

D)         {5, 2}