Question 888921
{{{3xy + 2(x^2 + y^2)=3(7)2 + 2(7^2 + 2^2)}}}
{{{3xy + 2(x^2 + y^2)=42 + 2(49 + 4)}}}
{{{3xy + 2(x^2 + y^2)=42 + 2(53)}}}
{{{3xy + 2(x^2 + y^2)=42 + 106}}}