College Algebra / Unit 2 Alg 101 short lesson, about 20 seconds
Rational Expressions
Captions available
The idea
A rational expression is the quotient of two polynomials; wherever the denominator's value is zero, the expression is undefined.
In practice
A print shop's cost per poster is total cost over poster count — (50 + 2x)/x for a 50 setup fee and 2 per poster.
Where people slip
The denominator's zeros are excluded, not ignored.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
Unlocks
- Nothing yet depends on this.
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