Question

Please help!
I know it's probably simple, but I don't understand...

Answer 1

For the reciprocal, you swap numerator and denominator.

a. The reciprocal of
`(√(2))/(2)` is
`(2)/(√(2))`
To rationalize the irrational denominator, multiply numerator and denominator by the radical, then simplify.

`=(2 * √(2))/(√(2) * √(2)) = (2 √(2))/(2) = √(2)`

b.
`(-2)/(√(3)) = (-2 √(3))/(3)`