Answer:  A is in standard form.
zero-factor property:  If the product of two numbers is 0, then one of the numbers must be 0.
[If ab=0, then either a =0 or b = 0.]
To solve a quadratic equation
1)   Write the equation in standard form
2)   Factor the quadratic equation
3)   Use the zero-factor property
Example 1
Solve: 
Either 
x - 3 = 0 or x + 4 = 0
and x = 3 or x = - 4

Example 2
Solve: 
( x - 5)(x + 1) = 0
x = 5 or x = -1
 

Example 3
Solve: 
Standard Form is

(2x - 3)(x + 2) = 0
or 
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