College Algebra / Unit 3 Alg 137 short lesson, about 20 seconds
Rational Equations
Captions available
The idea
A rational equation contains at least one rational expression; multiplying both sides by the LCD clears the denominators.
In practice
1/x + 1/2 = 3/4: the LCD 4x turns it into 4 + 2x = 3x, a linear equation in plain clothes.
Where people slip
The LCD multiplies every term on both sides.
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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