(a²-4ab+4b²)(a²+4ab+4b²)请写出过程,

问题描述:

(a²-4ab+4b²)(a²+4ab+4b²)请写出过程,

(a²-4ab+4b²)(a²+4ab+4b²)=(a-2b)²(a+2b)²=[(a-2b)(a+2b)]²=(a²-4b²)²=(a²)²-2(a²)(4b²)+(4b)²=a的4次方-8a²b²+16b的4次方...