Answer:
The second one: [tex]8x^{2}y+7x^{2}-5y^{2}+3x-2+2x^{2}y-x^{2}-2y^{2}-3x-4[/tex]
Step-by-step explanation:
You have to combine the like terms (any numbers with the same variables and exponents)
[tex]8x^{2}y+2x^{2}y=10x^{2}y, 7x^{2}-x^{2}=6x^{2}, -5y^{2}-2y^{2}=-7y^{2}, 3x-3x=0, -2-4=-6[/tex]
If you put all of the answers together you get [tex]10x^{2}y+6x^{2}-7y^{2}-6[/tex]
