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填空题4..5(x-y+z)(-x+y+z)[z+()][]=z^2-()^2,5,(-a+b+c)(a+b-c)=[b-()][b+()]=[]

题目详情
填空题 4..5
(x-y+z)(-x+y+z)[z+(____)][_ __ __ _]=z^2-(____)^2,5,(-a+b+c)(a+b-c)=[b-(_____)] [b+(______)]=[_______]
▼优质解答
答案和解析
(x-y+z)(-x+y+z)[z+(x-y)][z- (x-y)]=z^2-(x-y)^2,
5.(-a+b+c)(a+b-c)=[b-(a-c)] [b+(a-c)]=[b^2-(a-c)^2]