(x-1)(x-3)+1
=x²-4x+3+1
=x²-4x+4
=(x-2)²
ab+a+b+1
=(a+1)(b+1)
因式分解 (x-1)(x-3)+1 ab+a+b+1
因式分解 (x-1)(x-3)+1 ab+a+b+1
数学人气:821 ℃时间:2020-03-20 21:22:25
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