Algebra 2 Flashcards: Using Conjugates With Complex Numbers

Study Using Conjugates With Complex Numbers in Algebra 2 with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

What is $\frac{4}{1-3i}$ written as $a+bi$ ?

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ANSWER

$\frac{2}{5}+\frac{6}{5}i$ . Multiply by conjugate $1+3i$ : $\frac{4(1+3i)}{(1-3i)(1+3i)}=\frac{4+12i}{10}$

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Algebra 2: Complex Number Operations

Operations with Complex Numbers49 cards

Understanding Complex Numbers52 cards

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What this deck covers

This deck focuses on Using Conjugates With Complex Numbers, giving you a quick way to review the definitions, rules, and examples that matter most for Algebra 2.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Practice questions

1 of 50Practice questions for this set

What is the complex conjugate of

2-5i

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