en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

simplify (4i)(-i)

Solution

simplify

(4 i) (- i)

Solution

4

Solution steps

(4 i) (- i)

Apply rule:

a (- b) = - ab

(4 i) (- i) = - 4 ii

= - 4 ii

Apply exponent rule:

aa = a^{2}

ii = i^{2}

= - 4 i^{2}

Apply imaginary number rule:

i^{2} = - 1

= - 4 (- 1)

Multiply the numbers:

- 4 (- 1) = 4

= 4

Popular Examples

simplify-2i*(-5)i simplify

- 2 i \cdot (- 5) i

factor 3x^2+18x-48 factor

3 x^{2} + 18 x - 48

expand (4x+2)(6x^2-x+2)expand

(4 x + 2) (6 x^{2} - x + 2)

factor x^4+2x^3-4x^2-8x factor

x^{4} + 2 x^{3} - 4 x^{2} - 8 x

simplify-0.7(-5b-5b+7)-0.9b simplify

- 0.7 (- 5 b - 5 b + 7) - 0.9 b

Frequently Asked Questions (FAQ)

What is (4i)(-i) ?
The solution to (4i)(-i) is 4