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受欢迎的代数 >

700-(40)(9.81)=(40)((x^2)/3)

解答

700 - (40) (9.81) = (40) (\frac{x ^{2}}{3})

解答

x = \frac{2307}{10}, x = - \frac{2307}{10}

+1

十进制

x = 4.80312 \dots, x = - 4.80312 \dots

求解步骤

700 - (40) (9.81) = (40) (\frac{x ^{2}}{3})

交换两边

(40) (\frac{x ^{2}}{3}) = 700 - (40) (9.81)

去除括号:

(a) = a

40 \frac{x ^{2}}{3} = 700 - 40 \cdot 9.81

数字相乘:

40 \cdot 9.81 = 392.4

40 \frac{x ^{2}}{3} = 700 - 392.4

数字相减:

700 - 392.4 = 307.6

40 \frac{x ^{2}}{3} = 307.6

两边除以

40

\frac{x ^{2}}{3} = 7.69

在两边乘以

3

x^{2} = 23.07

对于

x^{2} = f (a)

解为

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

x = 23.07, x = - 23.07

23.07 = \frac{2307}{10}

- 23.07 = - \frac{2307}{10}

x = \frac{2307}{10}, x = - \frac{2307}{10}

作图

流行的例子

s im pl i f y 3 + 4

2 ∣ 25 x ∣ = 100

s im pl i f y 6 + 7

因式分解 x^3-7x^2+16x-12

f a c t or x^{3} - 7 x^{2} + 16 x - 12

化简 ((3+3i)(4-2i))/(2-2i)

s im pl i f y \frac{( 3 + 3 i ) ( 4 - 2 i )}{2 - 2 i}