Dr. fraser moves into Rational Expressions by first covering excluded values which arrive when an expression is divided by 0. Then comes simplifying rational expressions by eliminating the GCF. After covering excluded values in more detail, you will test your new found knowledge with four examples.
expression is a fraction whose numerator and denominator are
Any values of the
variable that make the denominator equal to zero produce an
undefined expression. So these values must be excluded when
we consider the rational expression.
a rational expression, factor the numerator and denominator
completely. Then cancel the common factors.
If two factors in
the numerator and denominator look almost the same, factor 1 out
of either of the factors and see if you get two identical factors.
are always determined using the original expression, not the
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.