x4次方-16 x方+x-4x 相同因式是 a .x方+4 b.x方-4 c.x+2 d.x-2
问题描述:
x4次方-16 x方+x-4x 相同因式是 a .x方+4 b.x方-4 c.x+2 d.x-2
答
d.x-2
x²+4-4x =﹙x-2﹚²
x4次方-16 =﹙x²+4﹚﹙x+2﹚﹙x-2﹚