Tìm x, biết: 4(x + 1)^2 + (2x + 1)^2 - 8(x - 1)(x + 1) = 11

1,Tìm x
a) 4(x+1)^2 + (2x+1)^2- 8(x-1)(x+1)=11
2) rút gọn
a) 2x(2x-1)^2-3x(x+3)(x-3)-4x(x+1)^2
b) (a-b+c)^2 - (b-c)^2 +2ab-2ac
c) (3x+1)^2-2(3x+1)(3x+5)(3x+5)2
d) (3+1)(3^2+1)(3^4+1)(3^8+1)(3^16+1)