(x-2y+3z)的平方-(x+2y-3z)的平方=用平方差公式,

2025-06-27 06:44:35
推荐回答(1个)
回答1:

(x-2y+3z)^2-(x+2y-3z)^2
=[x-2y+3z+(x+2y-3z)][x-2y+3z-(x+2y-3z)]
=2x*(-4y+6z)
=-8xy+12xz