College Algebra / Unit 2 Alg 109 short lesson, about 20 seconds
Dividing Rational Expressions
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The idea
Dividing by a rational expression means multiplying by its reciprocal; division hands the problem to multiplication.
In practice
(x/2) ÷ (x/6) becomes (x/2) · (6/x) = 3 — the x cancels, and 6 over 2 is 3.
Where people slip
Reciprocate the divisor only, never the first fraction.
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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