What is the answer to 81=(64)/(x^2) ?

The answer to 81=(64)/(x^2) is x= 8/9 ,x=-8/9

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

81=(64)/(x^2)

81 = \frac{64}{x ^{2}}

x = \frac{8}{9}, x = - \frac{8}{9}

Decimal Notation

x = 0.88888 \dots, x = - 0.88888 \dots

Solution steps

81 = \frac{64}{x ^{2}}

Multiply both sides by

x^{2}

81 x^{2} = 64

Solve

81 x^{2} = 64 : x = \frac{8}{9}, x = - \frac{8}{9}

x = \frac{8}{9}, x = - \frac{8}{9}

Verify Solutions

Find undefined (singularity) points:

x = 0

Combine undefined points with solutions:

x = \frac{8}{9}, x = - \frac{8}{9}

(3 x + 5)^{2} = \frac{- 1}{9 x + 15}

\frac{2}{x + 1} = 4 - \frac{2 x}{x + 1}

\frac{1}{x} = \frac{7}{300}

\frac{8}{x} = \frac{x}{6}

\frac{x + 5}{x} = e^{3}

What is the answer to 81=(64)/(x^2) ?
The answer to 81=(64)/(x^2) is x= 8/9 ,x=-8/9
Solve for x: 81=(64)/(x^2)
The solution is x= 8/9 ,x=-8/9