计算. (1)(-2x4)4+2x10(-2x2)3+2x4•5(x4)3. (2)(x-y-5)(x+y-5).

问题描述:

计算.
(1)(-2x44+2x10(-2x23+2x4•5(x43
(2)(x-y-5)(x+y-5).

(1)原式=16x16-16x16+10x16=10x16
(2)原式=(x-5)2-y2=x2-10x+25-y2