Question 974601
You must decide what to add and subtract to Complete The Square.  Study the lesson here: <a href="http://www.algebra.com/my/Completing-the-Square-to-Solve-General-Quadratic-Equation.lesson?content_action=show_dev">Lesson on how to Complete The Square, included here.</a>


Here is one of your examples:


(d):


{{{x^2-(2/9)x}}}
The term to use is  {{{((2/9)/2)^2=(1/9)^2}}}.
{{{x^2-(2/9)x+(1/9)^2-(1/9)^2}}}
{{{highlight((x-1/9)^2-1/81)}}}