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To divide two complex numbers, multiply by the complex conjugate of the denominator.

## Summary/Background

 A note about graphic calculatorsA graphic calculator, for example the TI-83 or similar model, can work with complex numbers. First select MODE and move down to select a+bi:Then press 2nd QUIT and enter a complex number sum.

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## This question appears in the following syllabi:

SyllabusModuleSectionTopicExam Year
AQA A-Level (UK - Pre-2017)FP2Complex NumbersComplex algebra-
AQA AS Further Maths 2017Pure MathsComplex Number BasicsComplex Algebra-
AQA AS/A2 Further Maths 2017Pure MathsComplex Number BasicsComplex Algebra-
CBSE XI (India)AlgebraComplex Numbers and Quadratic EquationsImaginary unit-
CCEA A-Level (NI)FP1Complex NumbersComplex algebra-
CIE A-Level (UK)P3Complex NumbersComplex algebra-
Edexcel A-Level (UK - Pre-2017)FP1Complex NumbersComplex algebra-
Edexcel AS Further Maths 2017Core Pure MathsComplex NumbersComplex Algebra-
Edexcel AS/A2 Further Maths 2017Core Pure MathsComplex NumbersComplex Algebra-
I.B. Higher Level1Complex NumbersComplex algebra-
Methods (UK)M3Complex NumbersComplex algebra-
OCR A-Level (UK - Pre-2017)FP1Complex NumbersComplex algebra-
OCR AS Further Maths 2017Pure CoreComplex Number BasicsComplex Algebra-
OCR MEI AS Further Maths 2017Core Pure AComplex Number BasicsComplex Algebra-
OCR-MEI A-Level (UK - Pre-2017)FP1Complex NumbersComplex algebra-
Pre-U A-Level (UK)7Complex NumbersComplex algebra-