Which of the following is the conjugate of a complex number with 5 as the real part and −2i as the imaginary part?
A.) 5 + 2i
B.) −5 − 2i
C.) −5 + 2i
D.) 5 − 2i

Question

Which of the following is the conjugate of a complex number with 5 as the real part and −2i as the imaginary part?
A.) 5 + 2i
B.) −5 − 2i
C.) −5 + 2i
D.) 5 − 2i

ganeshie8 · Answer

flip the sign of imaginary part to get the conjugate

directrix · Answer

The complex conjugate of a + bi is a – bi, and similarly the complex conjugate of a – bi is a + bi. This consists of changing the sign of the imaginary part of a complex number. The real part is left unchanged. Look at the examples here: http://www.mathwords.com/c/complex_conjugate.htm @Ashy98

ashy98 · Answer

So it would be D?

directrix · Answer

No. D is the orignal problem, not the conjugate.

directrix · Answer

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