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受欢迎的代数 >

14/15-2/3 x^2=-127/30

解答

\frac{14}{15} - \frac{2}{3} x^{2} = - \frac{127}{30}

解答

x = \frac{31}{2}, x = - \frac{31}{2}

+1

十进制

x = 2.78388 \dots, x = - 2.78388 \dots

求解步骤

\frac{14}{15} - \frac{2}{3} x^{2} = - \frac{127}{30}

将

\frac{14}{15}

到右边

- \frac{2}{3} x^{2} = - \frac{127}{30} - \frac{14}{15}

化简

- \frac{127}{30} - \frac{14}{15} : - \frac{31}{6}

- \frac{2}{3} x^{2} = - \frac{31}{6}

在两边乘以

3

- 2 x^{2} = - \frac{31}{2}

两边除以

- 2

x^{2} = \frac{31}{4}

对于

x^{2} = f (a)

解为

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

x = \frac{31}{4}, x = - \frac{31}{4}

\frac{31}{4} = \frac{31}{2}

- \frac{31}{4} = - \frac{31}{2}

x = \frac{31}{2}, x = - \frac{31}{2}

作图

流行的例子

completesquare x^2-30x+250

co m pl e t es q u a re x^{2} - 30 x + 250

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