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受欢迎的代数 >

sqrt((x-3)^2)=9

解答

(x - 3)^{2} = 9

解答

x = 12, x = - 6

求解步骤

(x - 3)^{2} = 9

两边进行平方:

(x - 3)^{2} = 81

(x - 3)^{2} = 81

解

(x - 3)^{2} = 81 : x = 12, x = - 6

x = 12, x = - 6

验证解:

x = 12

真

, x = - 6

真

解为

x = 12, x = - 6

作图

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