Question

What should be added x2+y2 to get  x2+y2 + 2xy?​

Answer 1

Answer: 2xy is the correct answer my friend

Step-by-step explanation: Stay safe! stay home! take care

Answer 2

Given: $x^{2} +y^{2}$ and $x^{2} +y^{2} +2xy$

We have to find the term that is to be added to $x^{2} +y^{2}$ to get $x^{2} +y^{2} +2xy$.

For that do subtraction:

We get:

$(x^{2} +y^{2} +2xy)-(x^{2} +y^{2})$

$x^{2} +y^{2}+2xy-x^{2} -y^{2}$

$2xy.$

Therefore, $2xy$ should be added.