Question

When do you use a conjugate? (math)

Answer 1

You use a conjugate to rationalize a denominator with a square root in it.

For example, take
`(1)/(5-√(3))`

To rationalize, you need to multiply by
`(5+√(3) )/(5+√(3))`

That would get you
`(5+√(3))/(22)`