Question

what should be added to X2 - 3xy + 3y^2 to get 5x^2-2xy -y^2+4​

Answer 1

Answer:

4x^2+xy-4y^2+4

Step-by-step explanation:

let the no. be k

x^2-3xy+3y^2 + k = 5x^2-2xy-y^2+4

k= 4x^2+xy-4y^2+4