1.解方程:6(x+1)²+2(x-1)(x²+x+1)-2(x+1)³=322.解不等式:(1-3y)²+(2y-1)²>13(y-1)(y+1)3.已知x+y=8,xy=14,求:7x²+7y²
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![1.解方程:6(x+1)²+2(x-1)(x²+x+1)-2(x+1)³=322.解不等式:(1-3y)²+(2y-1)²>13(y-1)(y+1)3.已知x+y=8,xy=14,求:7x²+7y²](/uploads/image/z/806712-24-2.jpg?t=1.%E8%A7%A3%E6%96%B9%E7%A8%8B%EF%BC%9A6%EF%BC%88x%2B1%EF%BC%89%26%23178%3B%2B2%EF%BC%88x-1%EF%BC%89%EF%BC%88x%26%23178%3B%2Bx%2B1%EF%BC%89-2%EF%BC%88x%2B1%EF%BC%89%26%23179%3B%3D322.%E8%A7%A3%E4%B8%8D%E7%AD%89%E5%BC%8F%EF%BC%9A%EF%BC%881-3y%EF%BC%89%26%23178%3B%2B%EF%BC%882y-1%EF%BC%89%26%23178%3B%3E13%EF%BC%88y-1%EF%BC%89%EF%BC%88y%2B1%EF%BC%893.%E5%B7%B2%E7%9F%A5x%2By%3D8%2Cxy%3D14%2C%E6%B1%82%3A7x%26%23178%3B%2B7y%26%23178%3B)
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