y=(n^2+n)x^2-(2n+1)x+1的因式分解
1个回答
y=(n^2+n)x^2-(2n+1)x+1
=n(n+1)x^2-(2n+1)x+1
=[(n+1)x-1](nx-1)
=(nx+x-1)(nx-1)
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