en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

simplify (-2-i)(4+i)

Solution

simplify

(- 2 - i) (4 + i)

Solution

- 7 - 6 i

Solution steps

(- 2 - i) (4 + i)

Apply complex arithmetic rule:

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

= (- 2 \cdot 4 - (- 1) \cdot 1) + (- 2 \cdot 1 - 1 \cdot 4) i

Simplify

(- 2 \cdot 4 - (- 1) \cdot 1) + (- 2 \cdot 1 - 1 \cdot 4) i : - 7 - 6 i

= - 7 - 6 i

Popular Examples

simplify 8sqrt(242)simplify

8242

factor (x-y)^4-25(x-y)^2 factor

(x - y)^{4} - 25 (x - y)^{2}

factor x^4-5x^2+10x-6 factor

x^{4} - 5 x^{2} + 10 x - 6

7(1+5n)+6(1+4n)=13

7 (1 + 5 n) + 6 (1 + 4 n) = 13

7 (x + 9) = 5 (x - 2)

Frequently Asked Questions (FAQ)

What is (-2-i)(4+i) ?
The solution to (-2-i)(4+i) is -7-6i