Question

what should be add to x²+xy+y² to obtain 2x²+3by?​

Answer 1

Answer:

x²-xy-y²+3by

Step-by-step explanation:

Let's take the unknown number as "z"

Question- what should be add to x²+xy+y² to obtain 2x²+3by?​

Simplified- x²+xy+y² + z = 2x²+3by

z= 2x²+3by - x²+xy+y²

z= 2x²+3by - x²-xy-y²

z= x²-xy-y²+3by