You didn't include the expression below. Without that that, we'd only be guessing.
rational expression
You divide the numerator of the rational expression by its denominator.
A rational expression is not defined whenever the denominator of the expression equals zero. These will be the roots or zeros of the denominator.
A rational fraction.
No.
If you divide a rational expression by another rational expression, you will again get a rational expression.
rational expression
rational expression
When the denominator is a factor of the numerator. If there is 2x in the numerator and denominator these terms cancel.
You divide the numerator of the rational expression by its denominator.
factor
It's the largest positive integer that will divide evenly with no remainder into both of them.
When the only common factor between numerator and denominator is 1.
To reduce a fraction to its lowest terms divide the numerator and the denominator by their highest common factor
Just write ANY fraction, with a polynomial in the numerator, and a polynomial in the denominator.
Both the numerator and denominator are polynomials
You will know because there are no other numbers that can go into both the numerator and denominator.