zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的代数 >

9b^2-49=0

解答

9 b^{2} - 49 = 0

解答

b = \frac{7}{3}, b = - \frac{7}{3}

+1

十进制

b = 2.33333 \dots, b = - 2.33333 \dots

求解步骤

9 b^{2} - 49 = 0

将

49

到右边

9 b^{2} = 49

两边除以

9

b^{2} = \frac{49}{9}

对于

x^{2} = f (a)

解为

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

b = \frac{49}{9}, b = - \frac{49}{9}

\frac{49}{9} = \frac{7}{3}

- \frac{49}{9} = - \frac{7}{3}

b = \frac{7}{3}, b = - \frac{7}{3}

作图

流行的例子

0.3^2+0.4^2=x^2

0. 3^{2} + 0. 4^{2} = x^{2}

solvefor t,0=0+17.2*t+1/2 (-9.8)t^2

so l v e f or t, 0 = 0 + 17.2 \cdot t + \frac{1}{2} (- 9.8) t^{2}

(x^2)/2+(13x)/(20)= 3/2

\frac{x ^{2}}{2} + \frac{13 x}{20} = \frac{3}{2}

1/2*2.1*v^2=6.5

\frac{1}{2} \cdot 2.1 \cdot v^{2} = 6.5

12 y^{2} + 2 y - 2 = 0