已知代数式x²+3x+9试写出x的两个值①试写出x的两个值,使代数式的值相等②当x为和值时,代数式的值最小
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![已知代数式x²+3x+9试写出x的两个值①试写出x的两个值,使代数式的值相等②当x为和值时,代数式的值最小](/uploads/image/z/1002801-57-1.jpg?t=%E5%B7%B2%E7%9F%A5%E4%BB%A3%E6%95%B0%E5%BC%8Fx%26%23178%3B%2B3x%2B9%E8%AF%95%E5%86%99%E5%87%BAx%E7%9A%84%E4%B8%A4%E4%B8%AA%E5%80%BC%E2%91%A0%E8%AF%95%E5%86%99%E5%87%BAx%E7%9A%84%E4%B8%A4%E4%B8%AA%E5%80%BC%2C%E4%BD%BF%E4%BB%A3%E6%95%B0%E5%BC%8F%E7%9A%84%E5%80%BC%E7%9B%B8%E7%AD%89%E2%91%A1%E5%BD%93x%E4%B8%BA%E5%92%8C%E5%80%BC%E6%97%B6%2C%E4%BB%A3%E6%95%B0%E5%BC%8F%E7%9A%84%E5%80%BC%E6%9C%80%E5%B0%8F)
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