What is (sqrt(-21)*sqrt(-3))/(sqrt(7)) ?

The solution to (sqrt(-21)*sqrt(-3))/(sqrt(7)) is -3

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

simplify (sqrt(-21)*sqrt(-3))/(sqrt(7))

simplify

\frac{- 21 \cdot - 3}{7}

- 3

Solution steps

\frac{- 21 - 3}{7}

- 21 - 3 = 213 i^{2}

= \frac{21 3 i ^{2}}{7}

Factor

21 : 37

= \frac{3 7 3 i ^{2}}{7}

37 i^{2} 3 = 7 i^{2} \cdot 3

= \frac{3 7 i ^{2}}{7}

Cancel the common factor:

7

= 3 i^{2}

i^{2} = - 1

= 3 (- 1)

Remove parentheses:

(- a) = - a

= - 3 \cdot 1

Multiply the numbers:

3 \cdot 1 = 3

= - 3

x^{2} + 3 x - 54 = 0

\frac{\frac{1}{10}}{2}

9^{3}

3 x^{2} - 3 x - 9

(\frac{1}{x + 1})^{2}

What is (sqrt(-21)*sqrt(-3))/(sqrt(7)) ?
The solution to (sqrt(-21)*sqrt(-3))/(sqrt(7)) is -3