in order to do this you have to multiply both factors. lets start with the first one. x times y is xy→ x times -3x is -3x^2→ -2y times y is -2y^2→ and lastly -2y times -3x is 6xy... the last number changed since a negative times a negative is a positive.. so your answer should be xy-x^2-2y^2+6xy
Hope this helps