(a-2b)(a+2b)(a^4+4a^2b^2+16b^4)不是因式分解,是计算,

Question

(a-2b)(a+2b)(a^4+4a^2b^2+16b^4) 不是因式分解,是计算,

Answer 1

(a-2b)(a+2b)(a^4+4a^2b^2+16b^4)
=(a^2-4b^2)(a^4+4a^2b^2+16b^4)
=a^6+4a^4b^2+16a^2b^4-4a^4b^2-16a^2b^4-64b^6
=a^6-64b^6