Question

Add the following:

\[2 x^2 - 3xy + y^2 \]
\[ - 7 x^2 - 5xy - 2 y^2 \]
4 x² + xy - 6 y²        

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Answer 1

\[2 x^2 - 3xy + y^2 \]
\[ - 7 x^2 - 5xy - 2 y^2 \]
4 x² + xy - 6 y²        
\[ - x^2 - 7xy - 7 y^2\]