Question 43025
 
  {{{b^2-2bc+c^2}}} = {{{(b-c)^2}}}
  
  Now replacing the values of 'b' and 'c' with 4 and -1 respectively, we get
 
=  {{{ (4 - (-1))^2 }}}
 
=  {{{ (4+1)^2 }}} = {{{5^2 = 25}}}  Answer.