Question

what should be added to 5x²y_3xy+2y²x-9 to get 7x²y+xy-​

Answer 1

Step-by-step explanation:

5x^2y-3xy+2y^2x-9+Z=7x^2y+xy

=>Z=7x^2y-5x^2y+xy+3xy-2y^2x+9

=>Z= 2x^2y+4xy-2y^2 x+9