√3 - √5

To simplify √3 - √5, we cannot combine the two terms because they have different square roots. However, we can simplify the expression by rationalizing the denominator.

To rationalize the denominator, we multiply both the numerator and the denominator by the conjugate of the denominator. The conjugate of √5 is -√5.

√3 - √5 = (√3 - √5) * (-√5)/(-√5) = (-√15 + 5)/(-√5)

Thus, √3 - √5 simplifies to (-√15 + 5)/(-√5).