分解因式:x2-4y2+x-2y.
问题描述:
分解因式:x2-4y2+x-2y.
答
x2-4y2+x-2y,
=(x2-4y2)+(x-2y),
=(x+2y)(x-2y)+(x-2y),
=(x-2y)(x+2y+1).