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Popular >

simplify (-5-i)(2+4i)

Solution

simplify

(- 5 - i) (2 + 4 i)

Solution

- 6 - 22 i

Solution steps

(- 5 - i) (2 + 4 i)

Apply complex arithmetic rule:

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

= (- 5 \cdot 2 - (- 1) \cdot 4) + (- 5 \cdot 4 - 1 \cdot 2) i

Simplify

(- 5 \cdot 2 - (- 1) \cdot 4) + (- 5 \cdot 4 - 1 \cdot 2) i : - 6 - 22 i

= - 6 - 22 i

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Frequently Asked Questions (FAQ)

What is (-5-i)(2+4i) ?
The solution to (-5-i)(2+4i) is -6-22i