en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

simplify (-1+2i)(-1-2i)

Solution

simplify

(- 1 + 2 i) (- 1 - 2 i)

Solution

5

Solution steps

(- 1 + 2 i) (- 1 - 2 i)

Apply complex arithmetic rule:

(a + bi) (a - bi) = a^{2} + b^{2}

= (- 1)^{2} + 2^{2}

(- 1)^{2} + 2^{2} = 5

= 5

Popular Examples

expand (u-1)^4 expand

(u - 1)^{4}

\frac{4}{7} \div \frac{7}{2}

\frac{1}{8} \div \frac{2}{3}

simplify 350^2 simplify

35 0^{2}

simplify sqrt(34)*sqrt(34)simplify

34 \cdot 34

Frequently Asked Questions (FAQ)

What is (-1+2i)(-1-2i) ?
The solution to (-1+2i)(-1-2i) is 5