Adding and Subtracting Polynomials
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
Polynomials add and subtract by combining like terms — terms with the same variable raised to the same power.
Show
(2x² + 3x) + (x² − 5x) collects to 3x² − 2x: the squares combine, the x-terms combine, and the two kinds never mix.
Watch for
Subtraction distributes its minus sign to every term behind it.
Builds on
- Nothing — this is a starting point.
Unlocks
- Nothing yet depends on this.