2 3 2
问题描述：
2 3 2
X - 64=?X -64X=?4X -64=?
2 2 2
4-(3a+2b) ==?25(X+Y) - 16(X-Y) ===?
2 2
(a-4)b+(4-a)c==?(2a+b) -(a-2b) ==?
答
1(x+8)(x-8)
2x(x+8)(x-8)
3, 4(x-4)(x=4)
4,(2-3a+2b)(2+3a+2b)
5, (5x+5y-4x+4y)(5x+5y+4x-4y)=(x+9y)(9x+y)
6, (a-4)(b-c)
7 (2a+b-a+2b)(2a+b+a-2b)=(a+3b)(3a-b)