Question

What should be added to 4x²+ 4xy + y² to get 6x²+9xy+y²​

Answer 1

p+4x²+4xy+y²=6x²+9xy+y²

p=6x²+9xy+y²-4x²-4xy-y²

p=6x²-4x²+9xy-4xy+y²-y²

p=2x²+5xy

therefore 2x²+5xy should be added to 4x²+4xy+y² to get 6x²+9xy+y²