Question 1208115
Doing B.  only


{{{-2(x^2+6x)-13}}}

{{{-2(x^2+6x+9-9)-13}}}  because needed term for completing the square is (6/2)^2=9

{{{-2((x^2+6x+9)-9)-13}}}

{{{-2((x+3)^2-9)-13}}}

{{{-2(x+3)^2+18-13}}}

{{{highlight(-2(x+3)^2+5)}}}