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初中数学：多项式ax³+bx²-2的一个因式是x²+3x-1，求a+b的值？
初中数学：多项式ax³+bx²-2的一个因式是x²+3x-1，求a+b的值？
初中数学，因式分解，常见考题，培优拓展专练4/340
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