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受欢迎的代数 >

9(x+9)^2-36=0

解答

9 (x + 9)^{2} - 36 = 0

解答

x = - 7, x = - 11

求解步骤

9 (x + 9)^{2} - 36 = 0

将

36

到右边

9 (x + 9)^{2} = 36

两边除以

9

(x + 9)^{2} = 4

对于

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

解为

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

解

x + 9 = 4 : x = - 7

解

x + 9 = - 4 : x = - 11

二次方程组的解是:

x = - 7, x = - 11

作图

流行的例子

(2 x - 1) (3 x + 1) = 0

2 x^{2} - 8 x - 15 = 0

4x+6x(x-5)+12=x^2+7

4 x + 6 x (x - 5) + 12 = x^{2} + 7

根 x^2+6x+58=0

roo t s x^{2} + 6 x + 58 = 0

solvefor t,d=vt+(at^2)/2

so l v e f or t, d = v t + \frac{a t ^{2}}{2}