Question

Which of the following is a conjugate for −10 + 3i?

Answer 1

How do you do conjugates?

I think the answer is -10 - 3i

Answer 2

yes

Answer 3

So you just change the second term?

Answer 4

the conjugate of \(a+bi\) is \(a-bi\) yes

Answer 5

So the conjugate of... let's say 6 + 7i is 6 -7i?

Answer 6

yes

Answer 7

it has a name because if you use the quadratic formula to solve an equation, and the zeros are complex, then if \(a+bi\) is a root, so is \(a-bi\)

Answer 8

also you should note that \((a+bi)(a-bi)=a^2+b^2\) a real number

Answer 9

Okay, thank you so much for your help. I get it now :)

Answer 10

yw