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受欢迎的代数 >

(x-3)^{2/3}=81

解答

(x - 3)^{\frac{2}{3}} = 81

解答

x = 732, x = - 726

求解步骤

(x - 3)^{\frac{2}{3}} = 81

对方程式两边

3

次方:

(x - 3)^{2} = 531441

(x - 3)^{2} = 531441

解

(x - 3)^{2} = 531441 : x = 732, x = - 726

x = 732, x = - 726

验证解:

x = 732

真

, x = - 726

真

解为

x = 732, x = - 726

作图

流行的例子

sqrt(10+x)=sqrt(x^2+4)

10 + x = x^{2} + 4

x + 2 + 8 = 3

sqrt(a)+sqrt(a)=sqrt(a)

a + a = a

sqrt(x)-13-sqrt(x)=-1

x - 13 - x = - 1

5(x+4)^{2/3}=45

5 (x + 4)^{\frac{2}{3}} = 45