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受欢迎的代数 >

(x+1)^2-7=0

解答

(x + 1)^{2} - 7 = 0

解答

x = 7 - 1, x = - 7 - 1

+1

十进制

x = 1.64575 \dots, x = - 3.64575 \dots

求解步骤

(x + 1)^{2} - 7 = 0

将

7

到右边

(x + 1)^{2} = 7

对于

(g (x))^{2} = f (a)

解为

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

解

x + 1 = 7 : x = 7 - 1

解

x + 1 = - 7 : x = - 7 - 1

二次方程组的解是:

x = 7 - 1, x = - 7 - 1

作图

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