Question

1、（2+1）（2^2+1)(2^4+1)(2^8+1)-2^16 2、a^3c-4a^2bc+4ab^2c

Answer 1

1)、（2+1）（2^2+1)(2^4+1)(2^8+1)-2^16

=(2-1)(2+1)2^2+1)(2^4+1)(2^8+1)-2^16

=2^16-1-2^16

=-1

2)a^3c-4a^2bc+4ab^2c

=AC(A^2-4AB+4B^2)=AC(A-2B)^2