lennajaneslaystheday lennajaneslaystheday

10-12-2021
Mathematics

contestada

Simplify the expression 2i(4.5 – 20i) + 3i. Write your answer in the form a + bi.

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jimrgrant1 jimrgrant1

10-12-2021

Answer:

40 + 12i

Step-by-step explanation:

note that i² = - 1

2i(4.5 - 20i) + 3i ← distribute parenthesis by 2i

= 9i - 40i² + 3i

= 9i - 40(- 1) + 3i

= 9i + 40 + 3i

= 40 + 12i

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