Question

29. What should be added to x ^ 2 + xy + y ^ 2 to obtain 4x ^ 2 + 9xy ?​

Answer 1

Question:

What should be added to x²+xy+y² to obtain 4x²+9xy?

Answer:

(x²+xy+y²) + (3x²+8xy-y²)

= x²+xy+y²+3x²+8xy-y²

= 4x²+9xy