Question

(x+y)^2+(x-y)^2 =___________ what is the formula​

Answer 1

Answer:

2(x² +y²)

Step-by-step explanation:

because when we open brackets using identities one 2xy is from 1st bracket and -2xy is fron second bracket,

being opp. they both cancel out each other and we obtain our final answer

2(x²+y²)