计算题:(x+2)(x-2)(x^2+4)(1) (x+2)(x-2)(x^2+4) (2) (2+1)(2^2+1)(2^4+1)……(2^2n+1) 快点!~~~~ 很急啊!

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计算题:(x+2)(x-2)(x^2+4)(1)     (x+2)(x-2)(x^2+4) (2)      (2+1)(2^2+1)(2^4+1)……(2^2n+1)   快点!~~~~ 很急啊!
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计算题:(x+2)(x-2)(x^2+4)(1) (x+2)(x-2)(x^2+4) (2) (2+1)(2^2+1)(2^4+1)……(2^2n+1) 快点!~~~~ 很急啊!
计算题:(x+2)(x-2)(x^2+4)
(1) (x+2)(x-2)(x^2+4)
(2) (2+1)(2^2+1)(2^4+1)……(2^2n+1)
快点!~~~~ 很急啊!

计算题:(x+2)(x-2)(x^2+4)(1) (x+2)(x-2)(x^2+4) (2) (2+1)(2^2+1)(2^4+1)……(2^2n+1) 快点!~~~~ 很急啊!
(1) (x+2)(x-2)(x^2+4)=(x^2-4))(x^2+4)=x^4-16
(2) (2+1)(2^2+1)(2^4+1)……(2^2n+1)
=(2-1)(2+1)(2^2+1)(2^4+1)……(2^2n+1)
=2^4n-1