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受欢迎的代数 >

5x^2+245=0

解答

5 x^{2} + 245 = 0

解答

x = 7 i, x = - 7 i

求解步骤

5 x^{2} + 245 = 0

将

245

到右边

5 x^{2} = - 245

两边除以

5

x^{2} = - 49

对于

x^{2} = f (a)

解为

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

x = - 49, x = - - 49

- 49 = 7 i

- - 49 = - 7 i

x = 7 i, x = - 7 i

作图

流行的例子

- 3 = 2 - y^{2} - y

3(x+8)^2+261=111

3 (x + 8)^{2} + 261 = 111

solvefor x,12x^2-3xy-6y^2=0

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6 x^{2} - 84 x + 240 = 0