求下列各式中的x的值:(1)x²=25; (2)(x-1)²=9; (3)x³=-64
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![求下列各式中的x的值:(1)x²=25; (2)(x-1)²=9; (3)x³=-64](/uploads/image/z/1780173-45-3.jpg?t=%E6%B1%82%E4%B8%8B%E5%88%97%E5%90%84%E5%BC%8F%E4%B8%AD%E7%9A%84x%E7%9A%84%E5%80%BC%EF%BC%9A%EF%BC%881%EF%BC%89x%26%23178%3B%3D25%EF%BC%9B+%EF%BC%882%EF%BC%89%EF%BC%88x-1%EF%BC%89%26%23178%3B%3D9%EF%BC%9B+%EF%BC%883%EF%BC%89x%26%23179%3B%3D-64)
求下列各式中的x的值:(1)x²=25; (2)(x-1)²=9; (3)x³=-64
求下列各式中的x的值:(1)x²=25; (2)(x-1)²=9; (3)x³=-64
求下列各式中的x的值:(1)x²=25; (2)(x-1)²=9; (3)x³=-64
x^2=25
x=±5
(x-1)^2=9
x-1=±3
x1=3+1=4, x2=3-1=2
x^3=-64
x=-4
(1):±5
(2):4或-2
(3):-4