Answer:
zero product property
Step-by-step explanation:
The Multiplication Property of Equality states that if you multiply both sides of an equation by the same number, the sides remain equal.
The Division Property of Equality states that if you divide both sides of an equation by the same nonzero number, the sides remain equal.
The Zero Product Property states that if , then either or (or both).
The Transitive Property of Equality states if and , then
In the problem shown, to conclude that or you need to use zero product property.