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受欢迎的代数 >

0=-1/500 (x-100)^2+20

解答

0 = - \frac{1}{500} (x - 100)^{2} + 20

解答

x = 200, x = 0

求解步骤

0 = - \frac{1}{500} (x - 100)^{2} + 20

交换两边

- \frac{1}{500} (x - 100)^{2} + 20 = 0

将

20

到右边

- \frac{1}{500} (x - 100)^{2} = - 20

在两边乘以

- 500

(x - 100)^{2} = 10000

对于

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

解为

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

解

x - 100 = 10000 : x = 200

解

x - 100 = - 10000 : x = 0

二次方程组的解是:

x = 200, x = 0

作图

流行的例子

2 x^{2} = - 6

x^{2} + 15 x + 25 = 0

s^{2} - 25 = - 25

4 x^{2} + 8 x - 4 = 0

2000x^2+1000x=3000

2000 x^{2} + 1000 x = 3000