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因式分解:1.x(y-1)+y(1-y)=?2.a的m+2次方-a的m-1次方=?
人气:411 ℃ 时间:2019-11-14 14:20:40
解答
x(y-1)+y(1-y)
=x(y-1)-y(y-1)
=(y-1)(x-y)
a^(m+2)-a^(m-1)
=a^(m-1)(a^3-1)
=a^(m-1)(a-1)(a^2+a+1)
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