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2x^2=8

解答

2 x^{2} = 8

解答

x = 2, x = - 2

求解步骤

2 x^{2} = 8

两边除以

2

x^{2} = 4

对于

x^{2} = f (a)

解为

x = f (a), - f (a)

x = 4, x = - 4

4 = 2

- 4 = - 2

x = 2, x = - 2

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