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受欢迎的代数 >

x+sqrt(x)-20=0

解答

x + x - 20 = 0

解答

x = 16

求解步骤

x + x - 20 = 0

去除平方根

x = x^{2} - 40 x + 400

解

x = x^{2} - 40 x + 400 : x = 25, x = 16

x = 25, x = 16

验证解:

x = 25

假

, x = 16

真

解是

x = 16

作图

流行的例子

x^{\frac{2}{5}} = 9

x^{\frac{1}{2}} = 8

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