Question 1135983

to see how much is {{{5x^2 + 3xy + 2y^2}}} greater than {{{x^2 + 2xy - y^2}}}, subtract 

{{{5x^2 + 3xy + 2y^2-(x^2 + 2xy - y^2)}}}

{{{5x^2 + 3xy + 2y^2-x^2 -2xy +y^2}}}...combine like terms

{{{4x^2 + xy + 3y^2}}}->your answer