
Fixing fractions with x within the denominator comes to multiplying each the numerator and denominator by way of a suitable expression to get rid of the variable from the denominator. This system is an important for simplifying and appearing operations on rational expressions, that are algebraic fractions.
Getting rid of x from the denominator guarantees that the ensuing expression is well-defined for all values of x with the exception of those who make the denominator 0. This is very important for warding off department by way of 0, which is undefined.