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Popular >

simplify (-3-4i)(1+2i)

Solution

simplify

(- 3 - 4 i) (1 + 2 i)

Solution

5 - 10 i

Solution steps

(- 3 - 4 i) (1 + 2 i)

Apply complex arithmetic rule:

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

= (- 3 \cdot 1 - (- 4) \cdot 2) + (- 3 \cdot 2 - 4 \cdot 1) i

Simplify

(- 3 \cdot 1 - (- 4) \cdot 2) + (- 3 \cdot 2 - 4 \cdot 1) i : 5 - 10 i

= 5 - 10 i

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Frequently Asked Questions (FAQ)

What is (-3-4i)(1+2i) ?
The solution to (-3-4i)(1+2i) is 5-10i