What is the answer to x^{-2}=4 ?

The answer to x^{-2}=4 is x= 1/2 ,x=-1/2

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

x^{-2}=4

x^{- 2} = 4

x = \frac{1}{2}, x = - \frac{1}{2}

Decimal Notation

x = 0.5, x = - 0.5

Solution steps

x^{- 2} = 4

Refine

\frac{1}{x ^{2}} = 4

Multiply both sides by

x^{2}

1 = 4 x^{2}

Solve

1 = 4 x^{2} : x = \frac{1}{2}, x = - \frac{1}{2}

x = \frac{1}{2}, x = - \frac{1}{2}

Verify Solutions

Find undefined (singularity) points:

x = 0

Combine undefined points with solutions:

x = \frac{1}{2}, x = - \frac{1}{2}

x^{- 1} = 5

\frac{7}{9} = \frac{b}{b - 10}

f, T = \frac{1}{f}

y, x = \frac{3 y + 5}{7 y - 1}

\frac{x - 2}{x + 3} = 2