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受欢迎的代数 >

29.9-0.0031x^2=0

解答

29.9 - 0.0031 x^{2} = 0

解答

x = \frac{100 \frac{299}{10}}{31}, x = - \frac{100 \frac{299}{10}}{31}

+1

十进制

x = 98.20978 \dots, x = - 98.20978 \dots

求解步骤

29.9 - 0.0031 x^{2} = 0

将

29.9

到右边

- 0.0031 x^{2} = - 29.9

两边除以

- 0.0031

x^{2} = \frac{29.9}{0.0031}

对于

x^{2} = f (a)

解为

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

x = \frac{29.9}{0.0031}, x = - \frac{29.9}{0.0031}

\frac{29.9}{0.0031} = \frac{100 \frac{299}{10}}{31}

- \frac{29.9}{0.0031} = - \frac{100 \frac{299}{10}}{31}

x = \frac{100 \frac{299}{10}}{31}, x = - \frac{100 \frac{299}{10}}{31}

作图

流行的例子

2(2x^2-5)=3(2-3x^2),4x^2-3=6-3x^2

2 (2 x^{2} - 5) = 3 (2 - 3 x^{2}), 4 x^{2} - 3 = 6 - 3 x^{2}

14 = (2 x - 3)^{2} - 2

x^{2} - 0.3 x - 0.7 = 0

2 r^{2} - r - 4 = 0

solvefor x,12x^2-288x+1296=0

so l v e f or x, 12 x^{2} - 288 x + 1296 = 0