Question 528330
evaluate algebraic expression {{{ b^2-4*a*c }}} for {{{a = 4}}}, {{{b=6}}}, and {{{c = -4}}} 

{{{ b^2-4*a*c }}}...plug in {{{a = 4}}}, {{{b=6}}}, and {{{c = -4}}} 

{{{ 6^2-4*4*(-4)=36-16*(-4)=36+16*4=36+64=100  }}}