因式分解:(x-y+z)^2 - (2x-3y+4z)^2我的答案和你们一样,可老师算我错的!

问题描述:

因式分解:(x-y+z)^2 - (2x-3y+4z)^2
我的答案和你们一样,可老师算我错的!

(x-y+z)^2 - (2x-3y+4z)^2
=[(x-y+z) +(2x-3y+4z)][(x-y+z) - (2x-3y+4z)]
=(3x-4y+5z)(-x+2y-3z)

[(x-y+z)+(2x-3y+4z)]*[(x-y+z)-(2x-3y+4z)]
=(3x-4y+5z)*(-x+2y-3z)
建议去找老师问问,可能老师认为你写得不规范或有其他原因

(x-y+z)^2 - (2x-3y+4z)^2
=[(x-y+z) +(2x-3y+4z)][(x-y+z) - (2x-3y+4z)]
=(3x-4y+5z)(-x+2y-3z)

-(3*x-4*y+5*z)*(x-2*y+3*z)