en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

simplify (4-5i)(-1-7i)

Solution

simplify

(4 - 5 i) (- 1 - 7 i)

Solution

- 39 - 23 i

Solution steps

(4 - 5 i) (- 1 - 7 i)

Apply complex arithmetic rule:

(a + bi) (c + d i) = (a c - b d) + (a d + b c) i

= (4 (- 1) - (- 5) (- 7)) + (4 (- 7) - 5 (- 1)) i

Simplify

(4 (- 1) - (- 5) (- 7)) + (4 (- 7) - 5 (- 1)) i : - 39 - 23 i

= - 39 - 23 i

Popular Examples

\frac{23}{6}

simplify \sqrt[6]{64/729}simplify

expand (s+4)^2 expand

(s + 4)^{2}

simplify 12/50 simplify

\frac{12}{50}

simplify 2/14 simplify

\frac{2}{14}

Frequently Asked Questions (FAQ)

What is (4-5i)(-1-7i) ?
The solution to (4-5i)(-1-7i) is -39-23i