1.两个数和为6乘积为7求这两个数 2.一长方形周长30cm,面积54cm2,求长和宽 3) 5=4x-x平方 4)5=3x平方x2-6x-16=0 x2+3x-2=0 请你思考x2-5/2+1=0与2x2-5x+2=0有什么关系?3x2+8x+1=0 -3x+4x+1=0 2t2-7t-4=0 3x2
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![1.两个数和为6乘积为7求这两个数 2.一长方形周长30cm,面积54cm2,求长和宽 3) 5=4x-x平方 4)5=3x平方x2-6x-16=0 x2+3x-2=0 请你思考x2-5/2+1=0与2x2-5x+2=0有什么关系?3x2+8x+1=0 -3x+4x+1=0 2t2-7t-4=0 3x2](/uploads/image/z/7807752-0-2.jpg?t=1.%E4%B8%A4%E4%B8%AA%E6%95%B0%E5%92%8C%E4%B8%BA6%E4%B9%98%E7%A7%AF%E4%B8%BA7%E6%B1%82%E8%BF%99%E4%B8%A4%E4%B8%AA%E6%95%B0+2.%E4%B8%80%E9%95%BF%E6%96%B9%E5%BD%A2%E5%91%A8%E9%95%BF30cm%2C%E9%9D%A2%E7%A7%AF54cm2%2C%E6%B1%82%E9%95%BF%E5%92%8C%E5%AE%BD+3%29+5%3D4x-x%E5%B9%B3%E6%96%B9+4%EF%BC%895%EF%BC%9D3x%E5%B9%B3%E6%96%B9x2-6x-16%3D0+x2%2B3x-2%EF%BC%9D0+%E8%AF%B7%E4%BD%A0%E6%80%9D%E8%80%83x2%EF%BC%8D5%EF%BC%8F2%EF%BC%8B1%EF%BC%9D0%E4%B8%8E2x2%EF%BC%8D5x%EF%BC%8B2%EF%BC%9D0%E6%9C%89%E4%BB%80%E4%B9%88%E5%85%B3%E7%B3%BB%3F3x2%2B8x%2B1%3D0+-3x%2B4x%2B1%3D0+2t2-7t-4%3D0+3x2)
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