Question

The conjugate of $3+\sqrt{5}$ is?

• A. $3-\sqrt{5}$
• B. $\sqrt{3}+5$
• C. $\sqrt{3}+\sqrt{5}$
• D. $\sqrt{3}-5$

Answer 1

Answer: (A)

$3-\sqrt{5}$

The complex conjugate of a complex number is the number with an equal real part and an imaginary part equal in magnitude but opposite in sign.

The conjugate of $3+\sqrt{5}$ is $3-\sqrt{5}$.

Option A is correct.