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If the highest power of the pronumeral in an equation is two, then it is
said to be a quadratic equation.
Solving Quadratic Equations
We will consider the following methods to solve a quadratic equation:
The Null Factor Law
From this we can infer that:
If the product of any two numbers is zero, then one or both of the
numbers is zero.
That is, if ab = 0, then a = 0 or b = 0 (which
includes the possibility that a = b = 0).
This is called the Null Factor Law; and we use it often to solve
quadratic equations.
Example 1
Solution:
Key Terms
quadratic equation, Null Factor
Law, NFL
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