因式分解x^-xy-6y^+2x+14y-8 要过程,要么我看不懂
问题描述:
因式分解x^-xy-6y^+2x+14y-8 要过程,要么我看不懂
答
x²-xy-6y²+2x+14y-8
=(x-3y)(x+2y)+2x+14y-8
=(x-3y)(x+2y)+4x+8y-2x+6y-8
=(x-3y)(x+2y)+4(x+2y)-2(x-3y+4)
=(x+2y)(x-3y+4)-2(x-3y+4)
=(x+2y-2)(x-3y+4)