12 3/8. Feel free to ask any questions!
306+122=428
Because you add 6 & 2 in the ones place which is 8.
then 2 and 0 which is 2.
finally 1 and 3 which is 4
3/3=1 and 7/8 is < 1 so 3/3 is bigger
(y+x)^2=(x+y)^2
so
(x+y)^2+(x^2-2xy+y^2)
= (x^2+2xy+y^2)+(x^2-2xy+y^2)
= x^2+2xy+y^2+x^2-2xy+y^2
= x^2+x^2-2xy+2xy+y^2+y^2
= 2x^2+2y^2
if u want to simplify it more then it will be written as: 2(x^2+y^2)