Question

what should be added to
${x}^{3} + 3 {x}^{2} + 3x {y}^{2} + {y}^{3} \: to \: get \: {x}^{3} + {y}^{3}$
​

Answer 1

Answer:

let the other no. be 'a'

x ^3 + 3x ^2 + 3xy^2 +y^3 + a = x ^3 + y ^3

a = x^3 +y ^3 - x^3 -3x^2 -3xy^2 -y^3

a = -3x^2 -3xy^2

Answer 2

Answer :

Hi mate♕,

Good morning ,

Have a nice day ✌️ ,

Here is your answer :-

-3x^2 -3xy^2

Hope it help you ✌️❣️