Question 1142486
{{{ (a+b)^2 = a^2 + 2ab + b^2 = (a^2+b^2)+2ab }}}<br>

This should be enough for you to <em>easily</em> solve the first part.  


<br>
{{{ (2a-2b)^2 = 4a^2 - 8ab + 4b^2 =  4(a^2+b^2) - 8ab }}}<br>

  Use a similar approach to the first part.