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受欢迎的代数 >

(5001070)=(5001030)+(1/2500x^2)

解答

(500 \cdot 10 \cdot 70) = (500 \cdot 10 \cdot 30) + (\frac{1}{2} \cdot 500 \cdot x^{2})

解答

x = 202, x = - 202

+1

十进制

x = 28.28427 \dots, x = - 28.28427 \dots

求解步骤

(500 \cdot 10 \cdot 70) = (500 \cdot 10 \cdot 30) + (\frac{1}{2} \cdot 500 x^{2})

展开

500 \cdot 10 \cdot 70 : 350000

展开

(500 \cdot 10 \cdot 30) + (\frac{1}{2} \cdot 500 x^{2}) : 150000 + 250 x^{2}

350000 = 150000 + 250 x^{2}

交换两边

150000 + 250 x^{2} = 350000

将

150000

到右边

250 x^{2} = 200000

两边除以

250

x^{2} = 800

对于

x^{2} = f (a)

解为

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

x = 800, x = - 800

800 = 202

- 800 = - 202

x = 202, x = - 202

作图

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