分解因式:6x2+xy-2y2+2x-8y-8.

问题描述:

分解因式:6x2+xy-2y2+2x-8y-8.

原式=3x(2x-y-2)+3xy+6x+xy-2y2+2x-8y-8=3x(2x-y-2)+4xy-2y2+8x-8y-8=3x(2x-y-2)+2y(2x-y-2)+2y2+4y-2y2+8x-8y-8=3x(2x-y-2)+2y(2x-y-2)+8x-4y-8=3x(2x-y-2)+2y(2x-y-2)+4(2x-y-2)=(2x-y-2)(3x...