(x+3y-2z)(x-3y-2z)-(x+3y-2z)^2 要过程还有一道:填空:(x-y+1)(x+y-5)=(x-y-2+_____)(x+y-2-_____)=[(x-2)-(____)]*[(x-2)+(____)]=(____)^2-(____)^2=_________
问题描述:
(x+3y-2z)(x-3y-2z)-(x+3y-2z)^2 要过程
还有一道:
填空:(x-y+1)(x+y-5)=(x-y-2+_____)(x+y-2-_____)=[(x-2)-(____)]*[(x-2)+(____)]=(____)^2-(____)^2=_________
答