Question

[Đào Tùng Dương]

1,Rút gọn:

a, A= (a+b+c+d)\(^2\)+(a+b−c−d)\(^2\)+(a+c−b−d)\(^2\)+(a+d−b−c)\(^2\)

b, B= \(\left(3+1\right).\left(3^2+1\right).\left(3^4+1\right).\left(3^8+1\right).\left(3^{16}+1\right).\left(3^{32}+1\right)\)

2, Cho x+y=a, x.y=b. Tính:

\(a,x^2+y^2\)

\(b,x^3+y^3\)

\(c,x^4+y^4\)

\(d,x^5+y^5\)

3, 

a, Cho x+y=z, \(x^2+y^2=10.\)Tính \(x^3+y^3\)

b, x+y=a, \(x^2+y^2=b.\)Tính \(x^3+y^3\)theo a,b.

Giúp mk với! Thanks.