Question 1111095
{{{(x+y)^2=x^2+2xy+y^2=16^2}}}


{{{x^2+2*3+y^2=16^2}}}
{{{x^2+y^2=16^2-6}}}
{{{highlight(x^2+y^2=250)}}}

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{{{(x-y)^2}}}
{{{x^2-xy-xy+y^2}}}
{{{x^2+y^2-2xy}}}
{{{(x^2+y^2)-2*3}}}
{{{250-6}}}
{{{highlight(244=(x-y)^2)}}}