分解因式(主元法):x³+(1-m)x²-2mx+m²
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分解因式(主元法):x³+(1-m)x²-2mx+m²
分解因式(主元法):x³+(1-m)x²-2mx+m²
分解因式(主元法):x³+(1-m)x²-2mx+m²
x³+x²—m x²—2mx+m²
= x³—m x²+x²—2mx+m²
= x²(x—m)+( x—m) ²
=(x—m)( x²+x—m)