0. Review of College Algebra

Complex Numbers

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Multiple Choice

Identify the real and imaginary parts of each complex number.
$-4-9i$

$a = -9, b = -4$

$a = -4, b = -9$

$a = 4, b = 9$

$a = -4, b = 9$

Verified step by step guidance

Understand the format of a complex number, which is typically written as a + bi, where 'a' is the real part and 'b' is the imaginary part.

Identify the given complex number in the problem, which is −4−9i.

Recognize that in the complex number −4−9i, the real part 'a' is the coefficient of the real number, which is −4.

Identify the imaginary part 'b' as the coefficient of 'i', which is −9 in the complex number −4−9i.

Conclude that for the complex number −4−9i, the real part is −4 and the imaginary part is −9.

Master Introduction to Complex Numbers with a bite sized video explanation from Patrick

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Expert video explanations

Identify the real and imaginary parts of each complex number. −4−9i-4-9i−4−9i