Answer:
[tex]\sqrt{2}+9i[/tex]
Step-by-step explanation:
To make the conjugate of a complex number, change the sign of the imaginary part. The imaginary part is the part that has i as a factor.
Your number has real part √2 and imaginary part -9i. Changing the sign of the imaginary part makes it be +9i, so the complex number becomes ...
[tex]\bf{\sqrt{2}+9i}[/tex]
