用配方法解下列一元二次方程:(1)x²+6x+7=0(2)x²-7x-8=0(3)2x²+3=7x (4)t²+t-1=0(5)x²-6x+9=0 (6)x²+3x+3=0
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![用配方法解下列一元二次方程:(1)x²+6x+7=0(2)x²-7x-8=0(3)2x²+3=7x (4)t²+t-1=0(5)x²-6x+9=0 (6)x²+3x+3=0](/uploads/image/z/14476121-17-1.jpg?t=%E7%94%A8%E9%85%8D%E6%96%B9%E6%B3%95%E8%A7%A3%E4%B8%8B%E5%88%97%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8B%EF%BC%9A%EF%BC%881%EF%BC%89x%26%23178%3B%2B6x%2B7%3D0%282%29x%26%23178%3B-7x-8%3D0%283%292x%26%23178%3B%2B3%3D7x+%284%29t%26%23178%3B%2Bt-1%3D0%285%29x%26%23178%3B-6x%2B9%3D0+%286%29x%26%23178%3B%2B3x%2B3%3D0)
用配方法解下列一元二次方程:(1)x²+6x+7=0(2)x²-7x-8=0(3)2x²+3=7x (4)t²+t-1=0(5)x²-6x+9=0 (6)x²+3x+3=0
用配方法解下列一元二次方程:
(1)x²+6x+7=0
(2)x²-7x-8=0
(3)2x²+3=7x
(4)t²+t-1=0
(5)x²-6x+9=0
(6)x²+3x+3=0
用配方法解下列一元二次方程:(1)x²+6x+7=0(2)x²-7x-8=0(3)2x²+3=7x (4)t²+t-1=0(5)x²-6x+9=0 (6)x²+3x+3=0
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