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初中数学：若(x²+4x-5)º=x²-5x+5，求x的值？此题不难但容易错
初中数学：若(x²+4x-5)º=x²-5x+5，求x的值？此题不难但容易错
初中数学，解一元二次方程，根的判别式，韦达定理，中考培优真题106/168
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