ACT Preparation / Unit 11 ACT 1001 short lesson, about 20 seconds
The Zero-Product Property
Captions available
The idea
If a product is zero, a factor is zero: set the quadratic equal to zero, factor, and set each factor to zero.
In practice
x² − 5x − 14 = 0 factors as (x − 7)(x + 2) = 0, so x = 7 or x = −2.
Where people slip
Get zero alone on one side first.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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